I just got a strop, my first. I got it from eBay and the following is the link to see it:

Vintage Sanasack Barber Strop #576 - eBay (item 260525661250 end time Dec-27-09 18:13:45 PST)

One side says "Buckskin Tanned in Scotland" and "Genuine Sunasack Strop" made by SuntorBach. The other side says "The Magic Strop" and "Genuine Sanasack Strop" with the number 576.

Should this be two different strops or is one supposed to be used instead of a canvas or linen strop? One side feels slightly more smooth than the other side.