The lug decides how a strap or an end link leaves the case. Look at the inner corner where the spring bar sits. A dark line there is contact from a strap, not a story about origin. If the watch is on a strap, see whether the strap fills the space between the lugs or leaves daylight on both sides. Daylight means the strap is narrow for the lug width. That belongs with the diameter and the lug-to-lug length. Those three together describe how the watch meets the arm. A later reader can measure the same three things and see whether your note still holds.

How it differs

For the Audemars Piguet Royal Oak Offshore, compare the diameter you can measure with the length from lug tip to lug tip. A wide bezel can make the dial look smaller than the case. Keep the comparison inside this case idea.

Common mods

On the Audemars Piguet Royal Oak Offshore, people change the insert, the bracelet, or the hand set. Name the one part that was changed and leave the rest undescribed rather than guessing.

What to check on a used piece

Check the clasp position, the end-link gap, and whether the hands pass cleanly on the Audemars Piguet Royal Oak Offshore. Write those three and ignore the sales line. These notes are not authentication and not a shop.

A library page is written by {Site}. A photo post is one person’s notes. Neither authenticates a watch, offers it for sale, or speaks for the name on the dial.