Gold buttons featuring the Crown and the wording mentioned by you have never been used by police forces here in the UK. The only finish used has been white metal, black composite and chrome.

Best wishes,

Dave.

Hello Dave i have 100's of police buttons on my website for sale both LARGE and SMALL

regards Richard

Might have two or more for sale, but they are silver in color, and not gold.
Let me know if interested.

Joe

Hi
I have a tunic set but in chrome QC 4 large and 6 small