Bloody camera has chosen this moment to display READ ERROR, so here's a description:

Heuer Autavia
Case ref 1163
Case serial 271xxx

Crown at 9, pushers at 2 and 4. Turning bezel. Screw-back.

Cushion/tonneau case; 20mm-lugged. Stainless steeel.

All metal parts on this watch are silver/steel in color.

Matte black dial with white subs, bright metal indices and frame on date window at 6; tiny red red details just outside the indices.

Two subdials; 0-12 and 0-30.

Subdial hands: black.

Hour & minute hands: silver, with red tips and thin red stripe down the middle.

Center-sweep: solid red.

No continuous seconds hand.

Bezel insert is dual-scale: inner 0-60 in 5 minute intervals; outer is a tiny 0-12 scale. Black, silver numbers and dots.

Case back is plain, no markings whatsoever. Crown is marked with Heuer logo.

Dial text, top to bottom: AUTAVIA, (HEUER LOGO), AUTOMATIC, CHRONOGRAPH, SWISS. Text and minute track are white paint.

One owner since 1971; cosmetic condition maybe 75%; not ugly, but it's been worn. Edge of bezel insert neatly eroded all around, effectively cutting the tops off the tiny numerals in the 0-12 scale. Assume minimal overhauls have been carried out.

Crystal is acrylic, and does not look wrong for the watch. Might be the original, might be a properly-selected replacement.

Owner says he has original bracelet for it, which he'll try to dig out for me.

I don't have a case-opener, so I don't know what's in it.

So... is this enough for an order of magnitude of market value?