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I got a mental image of you wearing a bow tie working under the hood because it's safer than wearing a dangling tie.
16s 21j Illinois Santa Fe Special, double sunk Montgomery dial, Cool font, circa 1922.
Nifty Keystone J.Boss gf case
Not properly marked inside or outside, nor a proper set of hands to be RR grade but a top notch pw.
While serious shops would not have their mechanics wearing ties (all sorts of bad things could happen due to a tie), some service shops, like Esso as @Canuck pointed out, would have employees at service stations wear ties. Bow ties were common, but so were regular neck ties, tucked into their coveralls .