Square Piano by Baumann, C

Compass: FF-f3 (5 octaves).
Three hand stops: buff, two dampers at each side of keyboard.
Naturals: Black (ebony?) with two scribe lines including head/tail seam
Sharps: ivory slips on dark-stained wood (ebony?)
Flat, dark-stained wood key fronts
Tuning pins on right
Prop stick on left
Walnut, inlaid cross-grain lid panels, rosewood banding
4 round, tapered and fluted legs
Double-strung throughout
Prellmechanik ("primitive German," according to Clinkscale Online)

Stock photo   - does not represent the instrument