The extra fourth petal lowers the mandolin rail.
cornish piano
Fancy scrollwork
Cornish upright piano
We were recently given a piano made by the Cornish Piano & Organ Company. According to a Usenet post by someone who was able to decipher its serial number (20755), it was probably made in 1914.
It's seen some wear over the years, but seems to be in decent mechanical shape and plays nicely. I'll know more about that after our tuner's had a look at it, though.