Hi Hephaistos -
April 1st is over.......but for the fakers and their fans everyday is April 1st!
We nearly all know that objects for the Tsar were of exeptionel quality and markmanship! As far as I know all objects were marked by the artists/makers - but sometimes were not assayed oficially - masters vouched with their good name. The reason for that in my opinion: a certain secrecy.
I think it gives not much sense to discuss this "Franken-brooch", only some hints:
The material is as expected red gold, but the modern lock is yellow gold. Soldering and finish is more than poor!
2 simple examples for people like you and me:
Enamel brooch
Locking system "hook"
Silver/Gilded brooch (copy of a grave robbery from the Scyths...)
Modern locking system "safety"
A present for the Tsar
A gold and enamel box decorated with Tsar Nicholas II´s crowned monogram and diamonds. Produced for the 1913 Romanov Jubilee. Approximately 8 cm x 5 cm. Signed N.CH. (Nicholas Chernikov in Cyryllic lettering). Made by Bolin.
That´s the way presents look like....
Regards
Zolotnik