Hi

The answer is no, only the production cels has 
it, Studio Pierrot reproduction cels never have 
these seals ON them, instead repro cels has black 
stamp on the green frame, not the cel, most of 
them say anime fair 2000, or something similar, I 
am too lazy to check.

I actually live in Tokyo Japan, Angel run the 
site, I provide the goods, extremely hard work I 
tell you, it is really not easy to get good cels 
now days in Japan, since every private collector 
or dealers seems to do YJ instead of sellng to 
good old custormers from oversea, I have attended 
almost all the Studio Pierrot events in the last 
2 years, never seen a single reproduction cel 
with the gold seal ON the cel.

As a huge studio pierrot fan and collector, I 
love studio production cels with gold seal, and 
frankly I prefer ones with it, simply, because it 
looks nice, it can be removed, but you will 
damage the seal, so it is completely tamper proof.

Hope this helps, I will need find time to send 
Angel cels for next update.

take care