Can anyone identify this flower-and-stem maker’s mark on a vintage brooch?

Hello everyone!

I recently bought this vintage brooch at a secondhand shop in Japan, and I’m trying to identify the maker behind the mark.

The brooch has a distinctive flower-and-stem mark on the back. I have also found other vintage brooches in Japan with what appears to be the exact same flower-and-stem mark, but none of them has a brand name or any other obvious maker’s mark.

I asked someone knowledgeable about vintage jewelry, and their best guess was Florenza. However, I have not been able to confirm that this particular flower-and-stem mark was actually used by Florenza, so I’m still unsure.

Does anyone recognize this mark?

I would especially like to know:

●Who used this flower-and-stem mark?

●Is it a Florenza mark?

●Is it another jewelry maker or manufacturer?

●Does anyone have a reference showing this exact mark being used?

The fact that I have found several different vintage brooches with the same mark makes me think it may be a maker’s mark rather than a random decorative symbol.

Any information or leads would be greatly appreciated!

Thank you for your help!

Best regards,Taeka