The 46mm. Sicura GT4 from 1975. I know it's from that year because my mate bought it from Ciro Citterio menswear shop in Nottingham where he worked, and the strap is the original although it took him a year to find it...
We swapped, I provided a silver pocket watch and Albert chain.
Provenance! 😀
Reveille at zero-dark-forty something today...and I’ll be wearing my entire collection of [two] Speedy Gonzales watches [again]. I’ve been having problems with the local citizenry NOT noticing me wearing my entire collection of [two] Speedy Gonzales watches [which upsets me]...so I’m also going to wear my newly purchased Speedmaster lapel pin...