Thread: a real challange?
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Old 02-22-2020, 06:46 PM
Kevin Kuehn's Avatar
Kevin Kuehn Kevin Kuehn is offline
Workin' Late Again
  
Join Date: Jan 2011
Location: WI
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Pretty sure they were originally sealed in wax in an attempt to keep out moisture. Possibly vacuum impregnated too. Although I'll have to admit I wasn't around early enough to remember seeing those in NOS form.
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