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Lug markings

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Lug markings

Old 08-29-09, 07:58 AM
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Lug markings

This is a mark I found on the head tube lugs on a bike I'm overhauling for a guy at work. There was also a number "71". This is a Raleigh USA "record" 1984 by serial number, 25" frame. Any idea what it signifies?
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Old 08-29-09, 08:08 AM
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Designed for a 71 degree angle between the tubes. Roger
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Old 08-29-09, 12:46 PM
Charles Wahl
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When is the last time you saw a bike made in the 70s or 80s with a 71-degree head tube? And the angle between the top and head tubes is much greater than 71 degrees. Raleigh USA frames were made in Japan or someplace else than England, so the marks pictured may be characters from another alphabet, perhaps signifying the company that made the lugs. It also looks to me like the head lug was spot welded to the head tube before brazing.
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Old 08-30-09, 10:29 AM
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I believe that is the trademark for Japanaese lug manufacturer Eisho Seisakusho.
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