Yamaha DX7 ROM Cartridge - Set of #2 / #3 / #4

Set of (3) DX7 ROM Cartridges :

#2 - Orchestral & Percussive Group (A) / Complex & Effects Group (B) - NB82686

#3 - Master Group (A) / Keyboard & Plucked Group (B) - NB82829

#4 - Orchestral & Percussive Group (A) / Complex & Effects Group (B) - NB82830

I bought these somewhat recently (hmm... I guess it was like 8 years ago now...) when I got a DX7 that had a dead battery. They all worked as expected.

#2 has 'python' written on the label for some mysterious reason. That isn't a patch name so perhaps someone had a song called 'python' that used one of the patches but they couldn't remember which cartridge had the needed 'python' patch so they wrote 'python' on it. 🤔🤷‍♂️ The others do not have any snake names (or anything else) written on them.