I have two Sekine men's 10-speed bikes that were purchased in 1975. One is candy apple red, the other is pearl white. The frame sizes are 24.5 inches and 22.5 inches respectively (measured from center of crank bearings, along the vertical seat pipe, to center of the cross bar diameter).
The interesting thing about the pair is that they were purchased and transported home from the retailer, but never ridden. They were stored in a shed for 35+ years.
I finally got tired of storing them and am now prepared to sell. They cleaned up nice from all the dust that accumulated on them over the years. Needless to say, all parts are authentic, original and in pristine condition. If you are a collector or just interested in good quality products, you may wish to consider purchasing.
Price is $1000 for the pair.
NOTE: The candy apple red one has been sold. The pearl white is still available for sale.
I live in southeast Regina Saskatchewan if you are interested in viewing.