As typical for the period, all eyes are on Schoverling, Daly & Gales. Either directly or indirectly, American makers sourced the concern for their sourcing lines back to "their factory" in Suhl. Schoverling, Daly & Gales was the thread that binds and I contend that he sourced a gesteck from Liege and for some reason decided to forego the APUN satellite stamping effort. He had the talented pool of craftsmen in Suhl to build it and maybe for some reason they didn't work off the serial number from the Liege craftsmen. It doesn't have the typical Lindner control stamp and to paraphrase Axel E. in the local colloquial: H.A. Lindner didn't make jack. Then it was off to NY to be imported; on to Charles E. Overbaugh where he may have assembled the completed components that arrived in separate containers. Then it was forwarded on to firearms merchant John Prey Lower. Just a premise but it is highly plausible.
Kind Regards,
Raimey
rse