Kynoch 22 Headstamp with two dots

Here is a Kynoch 22 shot with a raised K headstamp with two raised dots. Any ideas as to the reason for the dots and when they were used?
%2022%20shot%20HS

Thanks

Paul

Any thoughts or WAG’s would be appreciated.

Paul

OK, here’s a thought, early. I have one with a single dot, but an impressed headstamp, then I have a raised Eley CB cap with two dots like this, plus another one with a dot at 12 along with a dot at 9. Others with a raised K have a more rounded head, but some i attribute to being slightly later do have a flatter head.
Nice HS !