FOUNDRY MOLD PATTERN Diecast Aluminum 'T' JOINT FRAME PIN vintage INDUSTRIAL

Description

vintage two-sided Foundry Mold Pattern of something like a 'T' Junction for a dowel pin: perhaps for fitted construction of a building frame -- the flip-side of the patterns are on the backside of this -- from the former 'Oregon State College - Industrial Engineering Dept.' (now OSU) -- pattern is
made of diecast metal-probably aluminum / casting pipe sprue is carved wood / backing is plywood
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-- 'junctions' measure about 3 1/4 by 4 5/8 in. -- board is 12 1/4 by 24 in. -- app. 10 pounds --
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some tarnish and dust o/w wear is moderate
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*always listing historical Tech
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