I was doing research for a cheap starter scope for my 50 and read through numerous google searches that SWFA scopes are made in Japan I think by Japan Optics Co. They're custom built to specs for SWFA.
Everything I've read also said SWFA bought out the brand from the 2nd owner, Tasco, that had degraded the quality of the scopes. SWFA since re-spec'd the scopes and moved them to a better manufacturer, said to be one the best, in Japan.
If you google, you will probably see all the same info I fond.
I plan to try out a fixed 20 power SWFA SS.