Most Zenith transistors are marked with a partial number.
Most start with 121- but usually thats left off.
Example is the hoz out. Its a 121-831 but only the -831 is
on the part. Later subs may have a different number. IIRC it was 121-1029
and was subbed to a 921-500.
Your color outs I would decipher:
743 = 121-743
F314 = maybe Fairchild & there EIA code or the date code.
Dont know what the 16 is.
Remember those color outs were used from IIRC A line through
CC2 sets & probably had a host of part ##'s but as long as you
up sub they all should work.
Anyhows later on they may use a better transistor that also
works on the old sets that used the 121-743. The old number
gets sold off & when gone the new number takes over 100%.
THIS IS NOTED IN THE Z PARTS CATALOGUE !!!
What is needed is a Zenith parts catalogue. But I have been looking
for one for years. They were VERY common, any Tom Dick or Harry
could get them from any Zenith parts distributor.
For now use the SK, ECG, TCG etc sub books to see if things up sub
& make sense.
73 Zeno
LFOD !