My old (1986) edition of Pick lists three varieties for Shanghai: green, red with black "Shanghai" and signatures, and red with blue "Shanghai" and signatures. It's a bit hard to tell from the scans, but I think your note is the "blue Shanghai" type. At least, it looks bluer than the serial numbers do.
Don't say "infinitely" when you mean "very"; otherwise, you'll have no word left when you want to talk about something really infinite. - C. S. Lewis