Good evening Parabuteo.
For your information the mounts you need for the Mk1 Meteor are Sportsmatch TO49. The width is 15mm.
Michael Tawn has about three pairs left at £20.00p a pair plus £2.99p P&P.
One of the mounts has an arrester pin which has to be removed before fitting to the Meteor.
The mounts fit a 1 inch scope body.
Hope this helps. Regards. Dave.