Anyone familiar with this mag card holder?

[Csaba Tizedes]

(12-05-2019 08:59 PM)mfleming Wrote:  I've never seen a photo or reference to one of these before

Behind the Iron Curtain, here Hungary I have a brand new foiled set and some used of these cards - so there is really strange if you never heard about it in San Jose, CA, USA

Csaba