hi Tony, its 'Kynoch 577/450'. It came with an assortment of military & commercial rounds so there wasn't a trend that gave a clue to its origin, it...
Jonnyc,
Thanks for that information...just what I was looking for! I wasn't sure exactly where these particular examples originated from, and now to...
Difficult to see on the photos, but there is at least one kanji stamped to the right of the date, this appears to be 町, there is another symbol above...