BTC Trinkets – Bitcoin Niche Items is an online store based in Finland and run by Eero Tulppala. The store sells various items, including bitcoin themed pins, pens, leather wallets, clothes, and key-chains. These two ‘challenge coins’ are amongst products produced and sold by Tulppala. Challenge coins carry the name because they often, though not always, celebrate some achievement. They have a long history, and are often produced in fairly small batches to give to event participants for commemorative purposes, for example in the militaries of various countries. These coins simply commemorate Bitcoin.
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