I have a mk1 .22 T prefix complete, and a less complete N series (has a much newer stock and innards). Not fussed about the innards, but the stock is annoying me...

T prefix Mk1 has engraved / stamped large BSA meteor logo on the top of the cylinder

N prefix (I think also mk1). same as above, but the identical BSA meteor logo is etched not engraved, and it also has the BSA and piled arms stamped into the raised section of the rear scope mount.

assume they are both still Mk1s ?

Rgds,
JB