ASCO is still in production but now they're are made in Egypt by Lord/Sotraco which bought the brand name from the Asco Blade Co here in the good old USA.
This nice NM/XF specimen is an original made here in the USA. There weren't that many of the "Hair Thin" blades produced so this is a much scarcer blade than other ASCO varieties.
Graphic features Atlas holding the world on his shoulders.
Note: Company changed name from Asco Blade Co to Asco Sales Co as they were tottering on the brink of defunctness & selling other goods in addition to razor blades.
Made by Asco Sales Co, St Louis MO