Hallmarks on Soviet Badges

[Ponchatoula]

Can someone tell me what these hallmarks on badges indicate? Do these hallmarks indicate gold plating?

ц-10k ц-10k ц-25k

And can someone explain why there is a ц-25k hallmark (25k??)?

Thanks in advance for your assistance.

[Aleksander P]

It means the price. Ц=цена (price), К=Копеек (Kopek).