Map Block

For Christmas 2022 I got a wonderful gift from a close friend. It is a print block, used to print maps. Specifically of Imperial County.

Here is a close up of a portion of the block itself. Above, you can see I did manage for find a way to print some with a homemade press. But this map has an interesting history.

Here you can see a short credit which is part of the block. No date can be found anywhere. It is notable that Salton City is not listed, which likely puts it to the mid 1950s at the latest. But even Salton Sea Beach is not listed, which puts it even further back.

But I later found some other examples of this map online and they contain an interesting detail:

Here you can see it is identical except for a date is listed (11/17/41) and the county clerk’s name. 1941 certainly is long before Salton City and Salton Sea Beach. But it makes me wonder, if this info is missing from my print block, does that mean it was added later (meaning my block is even older than 1941) or that it was removed (if so, why?).