Is the Invicta Speedway 6934 worth buying?

At its typical street price it is one of the cheapest Swiss-movement chronographs you can buy, with 200 m water resistance. Buy it as a rugged everyday sport watch, not as an investment.

Yes. It is rated to 200 m, which covers swimming and snorkeling. Do not press the chronograph pushers underwater, and have the seals checked after a few years.

How big is it on the wrist?

The case is 39.5 mm wide and 14 mm thick. That width suits most wrists, but the thickness makes it sit tall under a shirt cuff.

Does it have a sapphire crystal?

No. It uses mineral crystal, which resists scratches but will pick up fine marks with years of wear. Sapphire would cost more at this price.

What comes in the box?

The watch on its steel bracelet, plus Invicta's yellow presentation box and warranty card. It does not include a spare strap.

Invicta prices swing widely, and the Speedway line is discounted most during major sales events. Check the price history before buying; list prices are rarely what stores charge.