The Garrison, scaled up and put on steel.

The AW0050 takes the Garrison dial and gives it a 43mm case. The Arabic numerals grow with it, and an inner 24-hour ring sits inside them so the dial can be read in either convention. The hands are luminous, the seconds hand is red-tipped, and a calendar window sits at three o’clock.

That extra width changes the watch’s character. The 37mm BM8180 is a vintage-issue size that disappears; the AW0050 is a modern sport size with presence. Same design language, different wrist.

Where the small Garrison ships on nylon, the AW0050 ships on a solid stainless steel bracelet with a fold-over clasp released by push buttons. The lug width is 22mm, a common size, so a nylon or leather strap is an easy swap for summer.

The bracelet also adds weight and a different kind of durability: a steel bracelet does not fray, but it does show scratches, and it is the part of the watch you will notice on a hot day.

Citizen’s J800 is an Eco-Drive calibre, charged by light through the dial. It runs the three hands and the calendar and never needs a battery in normal wear. Citizen’s page lists both a day and a date display for this reference; the catalogue entry here records only the luminous hands, so confirm the calendar layout on your listing.

Water resistance is 100m, 10 bar, which Citizen describes as suitable for swimming, showering and snorkelling. The crystal is mineral. It is a knockabout watch that happens to be big.