Vintage Conversation Slide Rule Selector Lot Piping Engineering Calculator Read for Sale

Vintage Conversation Slide Rule Selector Lot Piping Engineering Calculator Read For Sale

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Vintage Conversation Slide Rule Selector Lot Piping Engineering Calculator Read:
$49.99

Please see photos for condition. Came across these from a recent clean out so not the original owner. Some have initials on them . Most are in pretty good shape. Most are dated from 60’s-70’s.