Does the PAM00288 really have an eight-day power reserve?

The standard PAM00288 uses a conventional automatic chronograph movement, not an eight-day caliber. Confirm the movement and reserve with the seller before buying, since some listings mix up references.

The case is rated to 300m, but the leather strap is not meant for water. Swap to a rubber or steel strap before swimming, and have the seals checked on an older watch.

How does it compare with the Luminor chronographs?

The Radiomir has the cushion case and wire lugs with no crown guard, so it sits flatter and looks dressier. Luminors are bulkier and more overtly sporty.

Is 45mm too big for everyday wear?

It depends on wrist size. The cushion case and wire lugs make it feel larger than a 45mm round watch, so try one on if you are under about 7 inches around the wrist.

What should I check on a used one?

Ask for service records, check chronograph start-stop-reset function, and confirm the crystal and case are original. Discontinued parts make a documented service history valuable.