Look at the spacing and alignment of dial markings, the profile of the bezel and how the strap meets the case. Photos can help organize listings but cannot substitute for independent authentication.
Compare front, side and strap images
Look for a straight-on view before comparing markers, hands or dial proportions. Use side images for the shape of the bezel and case. Compare the strap junction on both sides if photos are available. Small variations in camera perspective can make an edge look wider or narrower.
Keep text and images in separate notes
Record the reference and written specification exactly as the listing presents them. Note whether an image visibly supports a detail or whether the capture has no photo of it. A single catalog image cannot verify construction, serial numbers or origin.
Interpret the result conservatively
The comparison can help distinguish different archived designs, but it is not authentication of a physical watch. If the record is incomplete, limit the comparison to the fields and photographs that survived.