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Can you do the same with recent tumblr filenaming?
For instance,  tumblr_ae05e77904ffe2d2c9ec1870b8268bd3_1af42f9e_1280 ( https://throbbinggristle.tumblr.com/post/654522469652283392/lamb-bag-heavens-blade-by-coil-commitment-to ).
I tried to break it down on my own to see if I can extract a timestamp from it, but I'm not sure it's possible. My guess is tumblr_md5_CRC32_size.jpg , but I can't see why putting 2 hashes in the same filename.