Sock knitting machine up close - GIF

Sock knitting machine up close.

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Previously:

https://www.homemadetools.net/forum/...139#post165138
https://www.homemadetools.net/forum/...373#post169572
https://www.homemadetools.net/forum/...985#post164455
https://www.homemadetools.net/forum/...032#post137890

what I'd love to know is how they form the tiny slots the latch finger runs in (the hinged bit which closes the hook) - is it cut with a slitting saw, formed by forging, etc.