I'm stumped. Can someone help me out?
My usual haunts for SP/T&NO/SSW info have failed me this rare time, but I know that the schedule operated for some 60 years. 60 years rearward would get you to 1936 if measuring from SPs official (presumed) demise in 1996.
The problem is, I believe the schedule was dumped before 09/11/96. Accounting for this, the actual date could be as far back as 1931 and before.
So, I could use the help.