Necchi Alco zz
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It isn't as old as I like, but sis didn't want it to go to the trash. ZZ and buttonholer, Japanese.
Model A-509B-2. Runs anyway. Time for a bit of cleaning and checking of stitches.
Wish it were Italian. J=A 38. Oh well. Not bad for free. And I have the manual and a few bits.
15 x1 needle and quick adjust on the belt tension.