I have a very early 80's Specialized Sequoia and I've heard that they were made by 3Rensho. It says Specialized on the downtube and Sequoia on the front of the top tube. On the chain stay it says Designed by Jim Neeson(?).
It has the long point lugs and chrome dropouts. All of the filing looks to have been done very well.
There is no serial number. Only the size is listed.
Oh, and I've got an '83 with the chromed faces on the front and rear DOs, so that isn't necessarily an indicator. Mine doesn't have quite the lugwork found on the eogie or ebay examples, however, and mine has shorter chainstays.