Hi all,
Recently inherited my grandfather's 20" SB from '76 and also purchased a 24" queen from '48.
Thanks to this forum the 20" is fairly well documented and I'm confident in restoring it to original spec (bar chrome

).
However, unfortunately the same cannot be said for the queen (the size comparison in the photos probably gives a hint to why). So I thought I'd ask if anyone has can point me in the right direction to manuals, technical documentation or operation instructions?
Furthermore, I'm curious about the possibility of the engine being original despite featuring a robin engine not a Villiers 25RG. I've noted in this
post, the same engine has been used and further down CyberJack noted "Because of engine shortages post-war, SB fitted whatever they could get".
Cheers