Thanks for confirming Hiram.
So as I suspected an other ranks makers variation. Strongly I suspect it’s of WW1 vintage when Tiptaft seem to have been particularly active.
I know of at least 2 other KOSBs by Tiptaft, one was shown on this forum years ago but the embedded photobucket images have expired.
Attached is the example I missed on eBay last year.
The mark is easily missed and whilst undoubtedly not common I expect more are out there than have come to attention.
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