Impossible to get a slide rule via eBay when they were new,
and I would not be surprised to find that it would be nigh on impossible to find one on eBay now, and perhaps there is no market for a steam powered typewriter or a battery driven bookmark, either.
Actually I still like to use a slide rule myself, and no battery required! This clue may give you an idea of which age group I belong - and I have been into coins for roughly the same amount of time.
Edited by sel_69l
01/28/2021 08:53 am