There are many similar cardholder out there but I drew the pattern for this one myself.
Made from a single piece (kind of a big T shape), veg-tan leather, hand dyed, and saddle stitched with linen thread.
There's a coin compartment, and another one that will easily fit 5-6 cards.
As always, happy to share any details.
I use fiebings, they have two type of dye, the regular and the 'pro' one. Regular dye are alcohol based, and the pro one have a mix of oil and alcohol. I mostly use the pro dye, but I've had good results with both.
The one I used here is their royal blue pro dye.