I kept the one my first Chase card came in for a bit because I liked the slide mechanism. Threw it out when I found it again a while later.
Well, 37 is Amex, I believe that 373732 does exist (quick Google), and all Amex card numbers are grouped 4-6-5 digits. So that’s easy.
For the chargecards, it was always the case that digit 12 was the issue number, 13 and 14 were the number of the card on the account, and 15 was the check digit.
I worked out 12, 13 and 14 by having multiple users on a chargecard and having a few of my own lost/stolen/compromised. My first platinum card was 100 in digits 12 to 14. After it was lost or stolen the next one was 200 (and the check digit changed of course, standard Luhn algorithm to calculate that). My wife’s Supplementary card digits 13 and 14 were 01 and my Additional Card was 02. My parents had supplementary cards too and those were e 03 and 04.
I’m a very very sad individual 
Edit. Same thing doesn’t, as far as I know, apply to all Amex cards including some newer credit cards - but I’m not certain as I don’t have one.
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My current card ends x200x, and I remember the card I had previously, which was replaced due to unauthorised charges ended x100x, so that checks out.
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Not routinely but I do still have the card, card carrier, and booklet from my first Amex green card in 1990.
I would love to see that.
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I had noticed that my Amex cards were often x00x at the end but had never worked out the pattern - now it all makes sense!
I once ended up with two cards with the same last four digits, which then makes it a bit hard to differentiate if you’ve saved the details on a website - so asked them for a new number, which they were happy to do. I guess they both ended 100x and coincidentally ended up with the same check digit.
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I’m not absolutely sure where it is but I’ll have a look, probably during the Christmas / New Year break.
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Ulster Bank Debit Card on Apple Pay has been changed to the RBS Debit Card Design.
That’s a shame I rather liked the blue design.
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I dread to ask but do you also collect the variations in bags that the supermarkets put out? I’m sure I read a while back that people collect those too 
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The mind boggles 
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The big blue ones?
you may be interested in this, in that there London:
Keychain bag? This thread is getting thoroughly derailed 
IKEA issue credit cards in a few countries, it turns out.
Here’s the US version, which appears to be made of birch veneer:
Germany’s is quite similar:
here’s Portugal’s:
and Mexico’s:
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I wish IKEA did a Credit Card in the UK!!!
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Turns out they can do you fixed term savings account with a not at all shabby interest rate
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Oh dear. What have I started now 
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I used to work for Ikano bank. They had Yorkshire Tea teabags in the kitchen in the HQ in Luxembourg.
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I’m in Panama and changed my Visa debit to a Mastercard debit. Curve blocks non-EEA Visa cards so that was a big incentive to switch.
Quite like the design. The bank decided that Visa cards can work on Apple Pay but Mastercards don’t, strange stuff.
(Used Clean Up to delete the numbers. Did a good job I think).
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