I don't know.
I do know that Sunn was very frugal, and used the same basic cabinet for several different speakers. For instance, the Sceptre cabinet was the same as a 200S cabinet, with a different baffle and neither of the "folded horn" pieces inside. However, the cabinet walls were routed for them. Whether or not you want to call that a 200S cabinet is up to you.
Given that, I'd say it's likely that all of the 200S sized cabinets were built, routed for the internal baffles, then finished as whatever cabinet they needed at the time.