Customer sent me an E-mail about his sticker label Royal that has clips on it....He said he had read somewhere that sticker labels never had clips from the factory and wanted to know if I could install them so the regulator would be period correct....
Once again, information on the web is incorrect.....He didn't reference the source but they are wrong.... Below are images from 70's era USD catalogs clearly showing circle or sticker label regulator with clips.....One thing we have figured out about USD is that there are very few absolutes when it comes to double hose regulators....They never threw parts away and if they had parts available they probably used them on something.
I'm 99.9999% sure the regulator he has left USD with clips on it.....I hate clips but they were correct for thousands of regulators...