yes, they work perfectly for any coin 2x2 . Good re-use of well made, obsolete stuff. I have a 1960s era TDC selectray brief case with 8 x 30 slot boxes. it weighs a good 4 kg
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You can even stuff two in each slot if space gets dear - and if you have stapled card ones, flatten the staples properly.
Jamais l'or n'a perdu la plus petite occasion de se montrer stupide. -Balzac