Sweet ride. I too just picked up a SHB (thanks to T-Mar), I thought mine was in great condition but your bike takes the cake! Great pics, I wanted to know how original my bike was and looking at your pics I notice everything is the same, along with the suspect tires (Silver Star). I notice the Sekine Canada sticker, therefore I assume that your bike was assembled in Manitoba. I plan to resto my Sekine but it will never be a nice as your's.
I participate in the MS Ride each year, next year, if finished, I'll ride the Sekine in honour of the original owner of your bike.