Personally, I never soloed a student who hadn't had simple spin recovery.
You don't need to do prolonged spins unless you want to. Just a turn or
two and recovery is fine. The idea is to become familiar with spin

Got my first logbook out 2/28/1954 it states----
Stalls-P.Off-Coord.Rolls---- Demo. Spin----Forced Lndings.--- It was my
second lesson 2:15 total time at end of lesson. Signed by A.C. Berry CFI
1081564 What a prince of an instructor. I soloed 2 months later :-)

I find numerous other log entries mentioning spins in this first log, but
nothing later on.

Perhaps I need some refresher training. grin

Cheers:

Paul
N1431A
KPLU