There I was...nail in hand.
I could scratch the ordinary 316L steel plate.
The hardened steel was scratch resistant.
Next, the actual watch. Would they let me try to scratch it?
In theory, the nail could not harm it having failed on the sample plate but in reality, I was loathed to even try as the watch costs nearly a quarter Million dollars
I chickened out......call me Foghorn Leghorn!
Regards,
MTF
316L steel

Hardened steel