Thanks for the info because I was aware that detachable parts had to be hallmarked in England. I have learnt from your kind comment that the same rule was applied in Russia, too. I have a sugar box with a hallmark struck even on the screw (detachable part, of course). There are no detachable parts in the kovsh — the handle is soldered to the body.
Still, I cannot understand the possibility of hallmarking hollow parts. It does take a considerable force to strike steel hallmarking tool into silver. I have repaired myself a golden indented hollow French ladies umbrella handle in the workshop of a friend of mine. We had to saw through it, repair the indented part by pushing it with wood of the same diameter from inside out and then soldered two pieces again. You must have heard of British ``hallmark dodgers`` who brought a light flatware to The Assay office, paid the tax, and returned to their workshop, cut off the flatware and attached it to the bottom of a teapot ten times heavier. Regards,