Dog Model

Mechanical Gramophone.
This model, as we read in the notes of Mr. Marco Contini, is eternalized in the brand "His Master's Voice" with the dog listening, and for this reason, called "Dog Model" is a gramophone equipped with a simple spring motor.
It was built in different versions: On the left the simplest, without a cabinet. Top right with a normal cabinet. Bottom right with a more sophisticated cabinet.

The history of the dog known as Little Nipper from Wikipedia;

Nipper (1884 – September 1895), also known as the Victor dog and the RCA dog, was a dog from Bristol, England, who served as the model for an 1898 painting by British painter Francis Barraud titled His Master's Voice.

This image became one of the world's best-known trademarks, the famous dog-and-gramophone pairing that was used by several record companies and their associated company brands, including Berliner Gramophone and its various affiliates and successors, among them Berliner's German subsidiary Deutsche Grammophon; Berliner's American successor the Victor Talking Machine Co. (later known as RCA Victor and then RCA Records); Zonophone; Berliner's (and later Victor's) British affiliate the Gramophone Co. Ltd. (informally known as His Master's Voice) and its successors EMI and HMV Retail Ltd.; the Gramophone Co.'s German subsidiary Electrola; and onetime Victor subsidiary the Japan Victor Company (JVC).

Grammofono meccanico.

Questo modello, come leggiamo negli appunti del Sig. Marco Contini, è eternato nel marchio "His Master's Voice" con il cane in ascolto, e per questo chiamato "Dog Model" è un grammofono dotato di un semplice motore a molla. È stato costruito in diverse versioni: A sinistra la più semplice, senza mobiletto. In alto a destra con un mobiletto normale. In basso a destra con un mobile più sofisticato.

In questo link sono elencati 19 modelli, di cui 19 con immagini e 0 con schemi.
Elenco delle radio e altri apparecchi della Gramophone Company Ltd., Gramophone & Typewriter Co. Ltd.; London