Columbus antique pocket watches

What to document first

Open the rear cover only if it can be done safely. Photograph the complete movement, serial number, grade markings, jewel count, adjustment markings, regulator, dial, case interior and exterior. Record the diameter excluding the crown.

Key inspection points

• Use maker-specific serial references.
• Check whether the movement is marked Columbus or a related name.
• Condition and rarity can outweigh broad brand recognition.

How to compare value

Compare watches by exact movement grade, size, jewel count, condition, case material, originality and service status. A common movement in a gold-filled case is not directly comparable with a scarce railroad grade or solid-gold example.