| Telimco Wireless Telegraph   | 
			1905  | 
			Commercial TRX | 
			 | 
			2 | 
			  | 
			  | 
			  | 
			  | 
		
	
		
		
			| Spark Coil 1088  | 
			1907–10 ? | 
			Radio part | 
			 | 
			1 | 
			  | 
			  | 
			  | 
			$ | 
		
	
		
		
			| Telim Auto-Coherer No. 1098  | 
			1908–10  | 
			Radio part | 
			 | 
			5 | 
			  | 
			  | 
			  | 
			  | 
		
	
		
		
			| Electro Variable Condenser No. 9240  | 
			1908–14  | 
			Radio part | 
			 | 
			4 | 
			  | 
			  | 
			  | 
			$ | 
		
	
		
		
			| Electro Sending Helix No. 9270  | 
			1908–16  | 
			Amateur-D | 
			 | 
			3 | 
			  | 
			  | 
			  | 
			$ | 
		
	
		
		
			| Leyden Jar 1.5-Pint No. 9222  | 
			1908–19  | 
			Amateur-D | 
			 | 
			2 | 
			  | 
			  | 
			  | 
			$ | 
		
	
		
		
			| Leyden Jar 1-Pint No. 9221  | 
			1908–19  | 
			Amateur-D | 
			 | 
			2 | 
			  | 
			  | 
			  | 
			  | 
		
	
		
		
			| Electro Zinc Spark Gap No. 9220  | 
			1908–20  | 
			Amateur-D | 
			 | 
			2 | 
			  | 
			  | 
			  | 
			  | 
		
	
		
		
			| Electro Loose Coupler No. 12000  | 
			1909  | 
			mod-pre26 | 
			 | 
			1 | 
			  | 
			  | 
			  | 
			  | 
		
	
		
		
			| Electro Special Sending Helix No. 9270a  | 
			1909  | 
			Amateur-D | 
			 | 
			1 | 
			  | 
			  | 
			  | 
			  | 
		
	
		
		
			| Coherer   | 
			1909 ? | 
			Radio part | 
			 | 
			9 | 
			  | 
			  | 
			  | 
			$ | 
		
	
		
		
			| Large Tuner Frame No. 8486  | 
			1909/10  | 
			mod-pre26 | 
			 | 
			10 | 
			  | 
			  | 
			  | 
			$ | 
		
	
		
		
			| Electro Potentiometer No. 9250  | 
			1909–13 ? | 
			Radio part | 
			 | 
			9 | 
			  | 
			  | 
			  | 
			$ | 
		
	
		
		
			| Head Receivers No. 1305  | 
			1909–14  | 
			Speaker-P | 
			 | 
			4 | 
			  | 
			  | 
			  | 
			  | 
		
	
		
		
			| Electro Fixed Condenser No. 10000  | 
			1910–14  | 
			Radio part | 
			 | 
			4 | 
			  | 
			  | 
			  | 
			  | 
		
	
		
		
			| Electro Junior Fixed Condenser No. 10010  | 
			1911  | 
			Radio part | 
			 | 
			3 | 
			  | 
			  | 
			  | 
			  | 
		
	
		
		
			| Loose Coupled Tuner   | 
			1911 ? | 
			mod-pre26 | 
			 | 
			10 | 
			  | 
			  | 
			  | 
			  | 
		
	
		
		
			| Electro Tuner No. 8486A  | 
			1911 ?? | 
			mod-pre26 | 
			 | 
			6 | 
			  | 
			  | 
			  | 
			$ | 
		
	
		
		
			| Adjustable Spark Gap No. 9220a  | 
			1911–14  | 
			Amateur-D | 
			 | 
			7 | 
			  | 
			  | 
			  | 
			$ | 
		
	
		
		
			| Jr. Tuner Double Slide No. 9950  | 
			1911–14  | 
			mod-pre26 | 
			 | 
			3 | 
			  | 
			  | 
			  | 
			$ | 
		
	
		
		
			| Peroxide of Lead Detector No. 9235  | 
			1911–14  | 
			Radio part | 
			 | 
			11 | 
			  | 
			  | 
			  | 
			$ | 
		
	
		
		
			| The Electro Loose Coupler 1912 Version Cat. No. 12002 [Early version double slide primary.] | 
			1911–14  | 
			mod-pre26 | 
			 | 
			18 | 
			  | 
			  | 
			  | 
			$ | 
		
	
		
		
			| Electro-Lytic Bare-Point Detector   | 
			1912–16  | 
			Radio part | 
			 | 
			12 | 
			  | 
			  | 
			  | 
			$ | 
		
	
		
		
			| Electro Adjustable High Tension Condenser No. 530  | 
			1912–20  | 
			Amateur-D | 
			 | 
			9 | 
			  | 
			  | 
			  | 
			  | 
		
	
		
		
			| Electro Adjustable High Tension Condenser No. 531  | 
			1912–20  | 
			Radio part | 
			 | 
			4 | 
			  | 
			  | 
			  | 
			  | 
		
	
		
		
			| Electro Rheostat-Regulator No. 5000  | 
			1912–20  | 
			Radio part | 
			 | 
			3 | 
			  | 
			  | 
			  | 
			  | 
		
	
		
		
			| Zinc Spark Gap   | 
			1913  | 
			Amateur-D | 
			 | 
			4 | 
			  | 
			  | 
			  | 
			$ | 
		
	
		
		
			| Electro Commercial Detector No. 9500  | 
			1913/14  | 
			Radio part | 
			 | 
			9 | 
			  | 
			  | 
			  | 
			  | 
		
	
		
		
			| Electro Antenna Switch No. 8100  | 
			1913–18  | 
			Amateur-D | 
			 | 
			5 | 
			  | 
			  | 
			  | 
			  | 
		
	
		
		
			| Electro Commercial Oscillation Transformer No. 9600  | 
			1913–18  | 
			Amateur-D | 
			 | 
			4 | 
			  | 
			  | 
			  | 
			  | 
		
	
		
		
			| Gernsback Electrolytic Interrupter No. 8000  | 
			1913–18  | 
			Radio part | 
			 | 
			3 | 
			  | 
			  | 
			  | 
			  | 
		
	
		
		
			| Transmitting Helix   | 
			1914 ? | 
			Amateur-D | 
			 | 
			5 | 
			  | 
			  | 
			  | 
			  | 
		
	
		
		
			| Eico Spark Gap   | 
			1914 ?? | 
			Amateur-D | 
			 | 
			2 | 
			  | 
			  | 
			  | 
			  | 
		
	
		
		
			| Electro Tesla Transformer No. 7000  | 
			1914/15  | 
			Equipment | 
			 | 
			9 | 
			  | 
			  | 
			  | 
			  | 
		
	
		
		
			| Transcontinental Wireless Receiving Outfit No. 1600  | 
			1914/15  | 
			Radio | 
			 | 
			5 | 
			  | 
			  | 
			  | 
			  | 
		
	
		
		
			| Electro Commercial Spark Gap No. 9225  | 
			1914–16  | 
			Amateur-D | 
			 | 
			6 | 
			  | 
			  | 
			  | 
			  | 
		
	
		
		
			| Electro 1/2 K.W. Transformer Coil No. 8050  | 
			1914–18  | 
			Amateur-D | 
			 | 
			4 | 
			  | 
			  | 
			  | 
			  | 
		
	
		
		
			| Gernsback Rotary Variable Condenser No. 3500  | 
			1914–18  | 
			Radio part | 
			 | 
			23 | 
			  | 
			  | 
			  | 
			$ | 
		
	
		
		
			| Electro Bull-Dog Spark Coil 1-Inch No. DGE1088  | 
			1914–18 ?? | 
			Amateur-D | 
			 | 
			4 | 
			  | 
			  | 
			  | 
			$ | 
		
	
		
		
			| Electro Loose Coupler 1914 version Cat. No. 12002 [7-Tap Switch Secondary] | 
			1914–20  | 
			mod-pre26 | 
			 | 
			11 | 
			  | 
			  | 
			  | 
			  | 
		
	
		
		
			| Electro Navy Type 3 in 1 Coupler 1399  | 
			1914–20  | 
			mod-pre26 | 
			 | 
			2 | 
			  | 
			  | 
			  | 
			  | 
		
	
		
		
			| Electro Professional Loose Coupler 14000  | 
			1914–20  | 
			mod-pre26 | 
			 | 
			6 | 
			  | 
			  | 
			  | 
			  | 
		
	
		
		
			| Electro Vario Selective Coupler 11000  | 
			1914–20  | 
			mod-pre26 | 
			 | 
			14 | 
			  | 
			  | 
			  | 
			  | 
		
	
		
		
			| Audion socket and filament control unit   | 
			1915 ? | 
			Radio part | 
			 | 
			7 | 
			  | 
			  | 
			  | 
			$ | 
		
	
		
		
			| Electro Galena Detector No. 9700  | 
			1915–20  | 
			Radio part | 
			 | 
			7 | 
			  | 
			  | 
			  | 
			$ | 
		
	
		
		
			| Electro Loading Coil No. 8487  | 
			1915–20  | 
			Radio part | 
			 | 
			4 | 
			  | 
			  | 
			  | 
			$ | 
		
	
		
		
			| Inter-Ocean Wireless Receiving Outfit No. 1550  | 
			1915–20  | 
			Crystal | 
			 | 
			3 | 
			  | 
			  | 
			  | 
			  | 
		
	
		
		
			| Electro Commercial Wireless Receiving Outfit No. 1387  | 
			1916  | 
			Crystal | 
			 | 
			2 | 
			  | 
			  | 
			  | 
			  | 
		
	
		
		
			| Electro Professional Loose Coupler   | 
			1916  | 
			mod-pre26 | 
			 | 
			10 | 
			  | 
			  | 
			  | 
			$ | 
		
	
		
		
			| Fixed Variable Condenser No. 10000  | 
			1916 ?? | 
			Radio part | 
			 | 
			4 | 
			  | 
			  | 
			  | 
			  | 
		
	
		
		
			| Trans-Oceanic Undamped Wave Loading Coil No. HEK4500  | 
			1916–18  | 
			Radio part | 
			 | 
			11 | 
			  | 
			  | 
			  | 
			  | 
		
	
		
		
			| Radiocite Crystal No. EK3939  | 
			1917 ?? | 
			Radio part | 
			 | 
			3 | 
			  | 
			  | 
			  | 
			  | 
		
	
		
		
			| Electro Arlington (NAA) Baby Timer No. 4433 [Early version] | 
			1917/18  | 
			mod-pre26 | 
			 | 
			10 | 
			  | 
			  | 
			  | 
			  | 
		
	
		
		
			| Electro Radiotone No. HK1800  | 
			1917–20  | 
			Radio part | 
			 | 
			3 | 
			  | 
			  | 
			  | 
			  | 
		
	
		
		
			| "Electro" Wireless Key No. 9212 [30 Amperes Capacity] | 
			1918–21  | 
			Morse+TTY | 
			 | 
			8 | 
			  | 
			  | 
			  | 
			$ | 
		
	
		
		
			| RegenRec   | 
			1919  | 
			mod-pre26 | 
			 | 
			 | 
			 | 
			  | 
			  | 
			  | 
		
	
		
		
			| Arlington (NAA) "Electro" Baby Timer No. 4433 [Later version] | 
			1920  | 
			mod-pre26 | 
			 | 
			2 | 
			  | 
			  | 
			  | 
			  | 
		
	
		
		
			| "Electro" Key-West (NAR) Radio Outfit No. 4444  | 
			1920  | 
			mod-pre26 | 
			 | 
			2 | 
			  | 
			  | 
			  | 
			  | 
		
	
		
		
			| "Electro" Nauen (POZ) Radio Outfit No. 4477  | 
			1920  | 
			mod-pre26 | 
			 | 
			6 | 
			  | 
			  | 
			  | 
			  | 
		
	
		
		
			| "Electro" Sayville (WSL) Radio Outfit No. 4455  | 
			1920  | 
			mod-pre26 | 
			 | 
			2 | 
			  | 
			  | 
			  | 
			  | 
		
	
		
		
			| "Electro" Trans-Pacific Receiving Outfit No. 1555  | 
			1920  | 
			Crystal | 
			 | 
			2 | 
			  | 
			  | 
			  | 
			  | 
		
	
		
		
			| "Electro" Tuckertown (WGG) Radio Outfit No. 4466  | 
			1920  | 
			mod-pre26 | 
			 | 
			2 | 
			  | 
			  | 
			  | 
			  | 
		
	
		
		
			| Interstate Wireless Receiving Outfit No. 1500  | 
			1920  | 
			Crystal | 
			 | 
			4 | 
			  | 
			  | 
			  | 
			  |