This should help
![Wink ;)](http://forums.sohc4.net/Smileys/default/wink.gif)
1975 K0 The frame serial number began GL1-1000012 while the engine serial number began GL1E-1000001.
1976 The frame serial number began GL1-2001483 while the engine serial number began GL1E-2001422.
1977 The frame serial number began GL1-3000001 while the engine serial number began GL1E-3000006
Good luck Prospect. The early naked Wangs are really nice bikes. I think all the other GW owners here will agree
![Grin ;D](http://forums.sohc4.net/Smileys/default/grin.gif)
Be sure to take some pics. The frame and engine vin just like the 750's won't match. On my 77 the last 3 of the frame vin is 169 and the eng vin is 208.
Before getting my 1977 GL1000 , just like you I was wanted a original first year Wing naked if possible. Thought I had found one had less than 30k on the dial but had fairing and bags added. The frame vin was correct for a 75 model year but after closer inspection the engine vin showed to that of a 77 model bike. That took the wind out of my sails and I let this bike pass by. Shortly after this I found my naked all original 77 with less than 10k. Sometime it pays to be patience.