Yeah 10speed is just the most ambiguous one. 24 - everyone know you mean 3x8, because if you have 2x12 (or 1x12) you say 12speed as a matter of habit. That chain clearly pre-dated 10 speed cassettes so the pic helped disambiguate anyway.

Didn’t realise there were hydraulic brakes 15 years ago.
Although also, that was the year before Wiggins won the TdF. I suddenly feel old.