It went out of businees in the 90's. Parts and stock were liquidated to various companies and individuals
No.
About $150
No,these were mostly made in Yugoslavia,with some early rifles finished in Manchester England.
i bought the firearms leagaly in december 2012
I don't know of any published data that exists for these firearms.
About $350, depending on condition. Factory engraved model higher.
Remington
They did not make firearms. They contracted with makers of firearms to put their name on the firearms they bought.
100-500 USD or more depending on specifics
Remington bought them.
There were two companies known as Interarms. The first was an importer/exporter, formed in 1953. They did not manufacture firearms. The second - and current - Interarms is a subsidiary of Hi Standard, and does not manufacture a PPK or PPK/S pistol. If what you have is actually a Walther PPK/S, value could range anywhere from $300 - $800, depending on specifics.
at the mossberg firearm factory.