I have a spare drive that needs work ,it is marked 19/10 and BG5330/847 , not sure what it came from . Is it likely to be any use on a Chrono featherbed 99 or Atlas with magnetic speedo??.
A Google search suggests this was originally from a Bantam. It is close to a 2:1 ratio so may suit a 99 chrono if a 5% extra error is acceptable.
Thanks Alan, I will fix it up , who knows might even be more accurate than the right one.