As Jack says, it's a Broadwood square piano. I have one dated 1803 and in the picture you can pick out bits of the Auld lang Syne air set to Burns' lyrics by Thompson. The tune can be found in Vol 4, number 394 of Johnson's Scots Musical Museum under the title of O Can ye Labour lea, Young Man. Burns obviously knew this air but his Auld Lang Syne was a reworking of an older song, also in JSMM with the older tune contributed by Ramsay, Vol l number 25.