How many Act Zaku were produced?

[False Prophet]

I suppose that as a testbed mobile suit for magnetic coating, there weren't that many Act Zaku produced during the OYW. I mean, factories and Granda already had to juggle between the Rick Doms, Gelgoogs, the United Maintenance machines, etc. while Pezun had the Gigan, Pezun Dowage, Galbaldy Alpha, and Gasshia to worry about.

Of course, after the EFF started using Act Zaku, they might had kept the production line running to both make new machines and replacement parts for existing units.

[bilbros]

According to a pair of old online Japanese sources (both apparently referring to the tabletop game Twilight of Zeon), about 20 units were built in total... but of course one should take such a figure with a big grain of salt.