Light on the crystal tells you about the edge of the case. A flat crystal shows a broad reflection. A domed crystal bends the reflection into a curve. Turn the watch under a lamp and watch that curve move. Pits in the crystal show as tiny dark points. A polished bevel on the lug should carry the lamp as a continuous line. A break in that line is a knock that was buffed flat on one side only. You do not need a loupe for this. You need a lamp and a minute. Write the result as a description of the surface, not as a grade and not as a comparison to a showroom piece.

How it differs

The crown side can be longer than the opposite side when guards are present. Measure the wear on the guard, not a slogan about the whole watch. For the Zenith Pilots Watch 45×14, keep the comparison inside this case idea and do not borrow a paragraph from the neighboring model.

Common mods

Pins and collars loosen. The result is stretch, and stretch is the modification a reader can see without opening the case. On the Zenith Pilots Watch 45×14 the useful sentence names one changed part.

What to check on a used piece

Test the crown in both positions you can reach without tools. Then look at the guards for dents that only show from the side. Apply that list to the Zenith Pilots Watch 45×14 and stop when the three checks are written.

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. These notes are not authentication and not a shop.