Tony: From the schedules dated February 10,1964 I show a six minute headway for the #1 Lcl (QT) and an from the schedule dated June 15,1964 I show a six minute headway fro the #3 Exp (T). Most of these began/ended at Astoria but there were a few pull-outs/put-ins at Queensboro Plaza.
General Headways-early 1960's rush:
IND
A 4 mins
BB 4 mins
CC 4 mins
D 4 mins
E 4 mins
F 4 mins
GG 5-am,6-pm
BMT
#1-Q 6mins
#1-QT 6 mins
#2-RR 6 mins
#3-T 6 mins
#3-TT 12 mins
#4-N 6 mins
#5 12 mins
#7 6 mins
#10 8 mins
#11 8 mins
#14 6 mins
#15 6 mins
#16 3 mins
#1-M Brighton-Nassau aka "Bankers Special" 4 trains am rush, 3 pm rush
#2-M/S 4 Avenue-Nassau about 4 trains am rush and 3 pm rush.
All these schedules changed of course when the Chrystie Street Line openned.
Larry,RedbirdR33