These are NOS (new old stock) small round key rings made in the 1950’s. They are perfect in every way,
solid brass nickle plated. Shiny and smooth. Much better than any repro rings you could buy which are not very good.
repros sell for 2.00 ea or more. These fit on 100 class,400,500,600,800,900,1000
class and others, ie, 130 ,144, etc. These are getting very very hard to find as even the repros are extremely difficult to get., and not very good either.
You are buying 1 ring with a choice of how many you want on checkout. shipping will be via first class mail unless you order
stock up while the price is low- you usually need about 50 of these to redo a 400 or 500 class machine
key check sets also available. (numbers/letters)
Shipping will be  5.00 flat cost