It almost looks like a pipeline valve key fitting to control flow......darn lol! I can see a lingering but faded memory of one of those when
pipelining was being introduce in one Province on a massive scale in 1980. yet almost looks like a specific fitting used to turn off or one pipeline
valves at one of the biggest Hydro electrical damns we have in THIS Province built to completion in 1985 0r 1986, & supplies most of canada and the
USA with electricity......it's just not quite kicking in yet....on the edge of a conscious thought lol! ............. hmmm....
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