That's a good pic. I don't knw what the name of that technique is, but it's accomplished via a VERY simple tool that is available at any tandy store. I picked one up when I was working on my replica, and it works like magic. You can also tell from your pic, right where the arrow is pointing, that they stamped out the corners of the card openings using a hole punch, and then cut the straight lines to make the full opening.UPDATE: I just spoke with Doug Shoemaker, the grandson of "Tex." They can still make a style # 311 and custom cut the wallet for your particular badge. Replica FBI / XF badges come in all sizes and configurations, most not identical to an issue FBI shield. Mr. Shoemaker says to send a tracing (NOT a photocopy as they shrink the image a little) of your particular badge and tracing of the outline of your ID cards. I would probably do a mockup with the tracings to show layout, sizing, etc.
It is model # 311 in black leather and the price is $47.97 (probably + tax and shipping). The phone number for Tex Shoemaker Leather Co. is 1-909-592-2071.
I don't know what this detailing is called, but it outlines both the ID and badge cutouts on the screenused ones. I don't know if this is an extra detail that must be requested or if it is standard. You may want to check if you order.
Paul, those are great pics you posted too. I can see a few of the tells that are in my set too Great pics, and great reference for those that have not gotten a good look at the early season wallets.