A question has arisen over the dating of the chain commonly known in modern parlance as "plumber's" chain, namely, the stamped brass, folded-over/interlocked form of chain. This has appeared on some of the extant Signal Corps "fuel" (turpentine) canteens and raised suspicion that it post-dates the Civil War period, and that the "S"-type, or Jack chain, was earlier. (Unless modern substitutions, this would suggest that there was further, post-Civil War, procurement of these specialized canteens, as opposed to continuing issue of wartime stock on hand.) I note that the idea of the interlocked chain is represented on Enfield nipple-protectors, but evidently in round, rather that flat stamped form. Can a member assist in ascribing a date to the stamped form of chain, and/or confirming or refuting Civil War period use?
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