I once had a small leaflet in my small collection of Airgun ephemera that was for a BSA scope for this Meteor . Made by BSA or at least marketed by them , in a simple cradle mount and yes not as easy to see thru as a modern 3-9x40 jobby , but in period for an early Meteor . Any of these older long pencil type fixed focal scopes will do if sticking to ' in period ' retro scoping up .