Everyone needs a grab & go quartz in their collection so why not make it a nice one? Nice & slim, it'll fit under cuff with no trouble and is a simple 3-hander with date complication. The 39.5mm size should fit most wrists very nicely, but since the strap is silicone I think I'd prefer to swap this for a leather - it's 20mm wide so will be easy to fit another one.
Interestingly, the WD description says Hardlex glass for the crystal, but Seiko's own web page says sapphire. I think at this price point you'd have to err on the side of the former.
Full specs:
Case Diameter: 39.5mm
Case Thickness: 9.8mm
Case Material: Stainless Steel
Crystal: Mineral
Movement: Seiko 6N76 Quartz w/ Date
Strap: Silicone
Water Resistance: 100m
Warranty: Seiko 3 Year
If you're looking for a quartz with a lot more functionality then Starbuy has on sale today for $699 a Citizen Promaster Ana-Digi, which is the Swiss Army Knife equivalent of a wristwatch. JOMW gave a sister model a thumbs-up for it.
Tacky but somewhat charming