No it doesn't. The only letters stamped on the case itself, are the "2A" which have been stamped over with "XX", and the terminal markings below the spring stack, "Y / BK / BB / W". I sold what I think was a slightly earlier version, to a collector in NJ a couple of years ago, and it was marked in a similar fashion, with the exception that it was still a "2A" and hadn't been "over stamped with "XX". It wasn't marked with patent dates either. I say that it may have been an earlier version of the "2A" because the governor drum appeared to have been stamped out, rather than machined. The small center hole where the governor shaft protrudes slightly, was situated within a slight "dimple", for lack of a better description. ( See picture ).
Jeff