I recently bought a near-pristine black gabardine SAS smock that has the wired hood and knit cuffs, plus a green tag. The tag doesn't have any military code number or a contract number on it, but there is the usual size info etc., including "To maintain water repellency reproof with a suitable reproofing agent". Has all the usual pockets, including poachers pocket at the rear. Buttons are black and threaded, not Canadian style. Seems like a really good one and the cotton gabardine is clearly thicker than the fabric on a another black SAS smock that I also have (this one has the contract code on the tag). Any ideas as to the age and user group who it was intended for?