Lol! Hong Kong! I saw these carbs on a German moped part site. www.mopedparts.de. I never said they were old, or German made, but the site is German. Lol Doesn't surprise me.
Bing is still around, sort of, but I suspect they've gone the China route on production. Hard to say for sure if these are Bing sanctioned products or just blatant reverse engineering clones. Bing logo is cast into the primer cap. They look like decent quality from the close up shots on the German site, but maybe not. Look at that site under the Hercules - Sachs > Kraftstoff > Bing typ 1 SSB section. Check how the air filter inserts and wire clips are modern yellow chromate finish. Fakes or not, you can spot them a mile away.
Bing is still around, sort of, but I suspect they've gone the China route on production. Hard to say for sure if these are Bing sanctioned products or just blatant reverse engineering clones. Bing logo is cast into the primer cap. They look like decent quality from the close up shots on the German site, but maybe not. Look at that site under the Hercules - Sachs > Kraftstoff > Bing typ 1 SSB section. Check how the air filter inserts and wire clips are modern yellow chromate finish. Fakes or not, you can spot them a mile away.