Berry Piano

[shiona]

I have an art deco style Berry piano which I would like to sell. It has 7octaves and is in good condition with a few minor scratches. The code on the metal frame is 35793 and on the side of the piano 11867. There is also a label with "Nathaniel Berry and Sons ltd. This Piano is fitted with Berrys New Improved Girder Bars".
Could you please give me an idea of the date of the piano and a rough guide to price?
Many thanks.