Honda CB550 or CB750 seat rail my sku 7769

It was sold to me as a CB550 model, but that needs to be verified.  .  I know for sure it is NOT a CB350G, it is too wide, it is not a CB350 Four either   

 It measures 36 mm total length.  s

29.5 mm inside between the shock mounts,

17mm from frame mount to shock mount  

19mm inside on the frame mount bosses.  

Very good condition, straight no dents or scratches.  chrome is very good, no rust except a small amount at welds of the the frame mount bosses.  It has its turn signal mountA little close work with steel wool should take care of that. 

Please verify your dimensions before you order to make certain it will fit as there is no return of parts.