Is the Invicta Speedway Strivax worth buying?

It is a reasonable budget chronograph when the price sits at the low end of its range. Priced near the top of its range it competes with better-finished quartz watches, so what you pay matters.

How big does the 45mm case wear?

It wears large. A 45mm round case suits wrists around 7 inches and up; smaller wrists will find it bulky.

Is it a real chronograph?

Yes, it has a quartz chronograph movement with subdials. It is a functional stopwatch, not just decorative dials.

Yes. It is rated 20 ATM (200m), which covers swimming and snorkeling. That is far more water protection than most budget chronographs offer.

What comes in the box?

Typically the watch and its presentation box. Confirm strap or bracelet type and warranty terms with the seller before ordering.

How does it compare with a mechanical Speedway?

The quartz version is cheaper to buy and more accurate day to day, but it lacks the sweep and service appeal of a mechanical movement. The case and styling are the same bold Speedway look.