Plate types 2 and 3 might have been sold concurrently during the late ’teens and the ’twenties, but more information is needed to confirm or invalidate this. The third type is of a design used by Seybold (see images 3 and 4 by clicking the above thumbnail image) with an odd tuning pin configuration, with one vertical row of pins staggered much higher or lower than the next.We now believe this piano is a second, later variety of Smith, Barnes and Strohber. As in the early Coinola pianos made by Smith, Barnes and Strohber, there is an extra break in the middle of the treble section, with a total of four sections of hammers.
MRHYTHMIZER ONLY ONCE FULL
The second type of piano has a full plate covering the pinblock, with a normal tuning pin configuration.In this design, the upper portion of the plate surrounding the pinblock is separate from the main plate below. The earliest Victor and Coinola keyboard pianos, made through the mid-teens, were probably obtained from Smith, Barnes & Strohber, characterized by an open face pinblock with a two-piece plate similar to those used in early Cremona pianos.Three main types of piano plates have been observed in Operators’ keyboard-style pianos, with examples viewable by clicking on the small thumbnail image at right: Soon after its introduction advertisements by the Operators Piano Company disappeared from trade publications, although instruments were shipped up into 1930. Unfortunately, by the time the Midget Duplex became available the coin piano market was in serious decline, and the automatic phonograph in its commercial ascendancy, leaving few buyers for the new Coinola Midget Duplex. Instead, a small lever front center on the case allowed the patron to select which roll was desired, left or right, and then once a coin was dropped and the piano motor started a 'foolproof locking' system prevented any further roll selection, until the piano motor shut down and any residual vacuum had bled off. The duplex roll setup did not shift to the other frame when the in use roll went into rewind. And it featured a duplex 10-tune roll frame arrangement, each roll frame utilizing a standardized style 'A' music roll scale, but supplied with Capitol A rolls of a special extended 15-tune length. It used a 66-note piano, but tuned differently than the typical late-style 66-note O-roll Midget pianos, so as to accommodate the style A-roll scale. The last coin operated piano to added to the Operators Piano Company's Coinola brand was the Midget Duplex, introduced in 1927, also known as the Thirty Tune Coinola.
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