I would of course number them when swapping for my new tapes to move inside the frame.
Offer stands 150,- euro + shipping for the brass tapes on 1976 emi from streetly from a broadcasting station so hardly used at all.
On a side note about the comment "most of you have estensive tape collections" how if i may ask? In the form of 2-3 frames and lots of tapes to spool in one of the frames or actually lots of framed tapes? Wich must add up heavily in costs