G'day,

Lester: I'm sure that - sometime far enough back - Jimmy Shand may have played a B/C/C# with only 48 Stradella basses ... but successive promotional items put out by Hohner seemed to showed the left-hand growing at a positively cancerous rate!

I think the final Shand model was the Shand Morino with 46 treble keys (12 more than this diagram) and 117 basses (61 more than this diagram)!

Foolestroupe: You are, almost certainly, right about Polly's little piano accordion. I'm not sure of the exact placement of the range, but it was a bass note and chord system ... and it did give a simple major accompaniment in the keys around the C / C / F set (... more likely to have had a Bb end ... if it was intended for use in Europe ... ?).

Regards,

Bob