Is the Longines Conquest 38mm a good everyday watch?

Yes. It is automatic, has a date, sapphire crystal and 100 m water resistance, so it handles office wear and swimming. The understated dial works with most outfits.

How does it compare with the HydroConquest?

The HydroConquest is a dive watch with a rotating bezel, screw-down crown and higher water resistance, and it is bulkier. The Conquest 38mm is slimmer and dressier, with less dive capability.

Yes, it is rated to 100 m, which covers swimming and showering. The crown is push-pull rather than screw-down, so avoid pressing the crown underwater and have it checked after heavy use.

What is the case size and weight?

The case is 38 mm across and the watch weighs about 4.3 oz on the steel bracelet. The lug width is about 19 mm, which limits some aftermarket strap choices.

Does it have a sapphire crystal?

Yes, the crystal is sapphire, which resists scratches well. It is not double anti-reflective coated, so expect some glare in bright light.

Is it a good first automatic watch?

It is a sensible choice: Swiss automatic movement, date and steel construction in a wearable size. It is less flashy than a dive watch but more versatile for daily wear.