Another trip to the Cape and another Shogun.

This one is a 300 Cro-Mo Double Butted bike for my wife. The SN is S535045. This leads me to believe that the frame was produced in 1985. The SN is missing the second alpha character that is on my 600, which denotes the month of manufacture. In addition to this difference, the first alpha character varies, in this case: M vs S but I've seen Y, etc. Any ideas on the alpha numeric structure of the SNs?

The blue one on the left is my 83 Shogun 600 and the new one is on the right.



I am back in Colorado so here they are in suspended animation until our next visit:



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