There are 50 words. At that time I was using an Electrum version that is years old now. Maybe around 2012? Definitely nothing newer, -snip-
Theoretically, you can create an non-standard old Electrum seed phrase with higher number words by using very old Electrum's "mnemonic.py" script with a very long seed (Hex, 3 words per 32-bit)E.g. in v0.30's mnemonic.py:
But you can't use that in old nor new Electrum clients, it's not the accepted "old_seed" format.
I doubt that it's an old Electrum seed if it isn't 12 words.