Nice to see others collecting the IHCs! I'm working on completing what I started 50 years ago. My Whitman's were falling apart so I went with the Dansco. The only ones I'm missing are the 1877 and 1909-S, on on a retirement income I may never get those two. So I upgrade what I have, and started collecting the Snow attributions - repunched dates, etc. I've got about 8 of those so far, and many were spotted on
ebay and unknown to the sellers, so I got them at low prices. Some I already had and didn't even realize it till I checked them out under magnification. Have fun with it!