Ah, I was thinking 'sterile' as in the intelligence world of 'sterile'. And not in the reproductive world of 'sterile' either!
Is that a fact that the 'I-xxxx' series Inglis 7.92's were devoid of any markings? How strange................. In the sneaky beaky intelligence world, this feature - or lack of ANY features - wouldn't fool anone after the first 3 seconds.
I'd describe that as '....devoid of any markings from new'. As in 'taken out after work ............' as opposed to 'scrubbed'