www.925-1000.com

Hi!
On the saturday's fleamarket I've found that small round brooch. It's possibly from Norway and I'm sure I've already seen that maker's mark. But I can't remember the name... :´-(
Who could help me with the identification?
Thank you!

None idea? :´-(

It is made by Hroar Prydz 1891- 1980? in Oslo

Thank you, Tosten!
I've always thought there's only the maker's mark "V" in circle.
Do you know when Prydz has used this helmet mark?