. . . case. The sub seconds variant is ref 2605. Same case and intriguing lugs but a cal 266 movement.
They're hard to find but not impossible; mine was sourced in Venezuela at reasonable cost. Servicing, strap and buckle, and original replacement parts set me back more than the watch.
This is the steel/gold quartz version. Remarkedly petite and light by todays standards but very wearable and comfortable. A titane auto would be very desirable!