Is It Safe To Soak 1862 - 1880's Hong Kong Qv Stamps?

No agb I don't think so. It would suggest the forgeries are printed one at a time maybe?

All fakes, no doubt, but neither Spiro nor Oneglia ones. Note that those have printed cancels. Sperati? Not a chance.

Take a look at the perfs. They look like they were made on a sewing machine and probably were. They won't gauge properly against genuine.

At first glance, the production style and backing paper looks to be from the tourists sheets sold as souvenirs similar to ones sold in China and Japan, with fakes from about the same time period. However, if you compare with pictures/scans of the original HK stamps, the Chinese characters in the left tablet don't match the genuine, nor are they necessarily written correctly. So I would say they were not made in an Asian country.