20”’ | Hand Wind | English Lever | Small Seconds |

Remarks:

• Rotherham = John Rotherham & Son Ltd., Warwickshire, England
• Rocking bar winding
• Click on the dial side

• Listing ID: 3262
• Manufacturer / Brand: Rotherham
• Caliber: 20''' (18 size)
• Size in French Lignes: 20''' (18 size)
• Size range mm largest diameter: > 40 mm
• Shape: Round
• Winding: Manual (Crown)
• Hands Setting: Crown with pin/pusher
• Seconds Hand: Small seconds
• Escapement: Lever (Swiss, English, Glashütte)
• Date, Day, Month...: None
• Jewels: 15
• Balance Position: Left (240 - 360°)
• Shock Protection: None
• Beats per hour: 18,000
• Balance Type: Bimetallic screw balance
• Power Reserve: Unknown
• Production Period: From the end of the 1880s until around 1930 (source: https://oxfordpocketwatches.blogspot.com/2017/02/rotherham-three-quarter-plate-keyless.html)
• Country: United Kingdom
• Identification: Rotherham logo (snake on trident in star) on the dial side.
• Contributor ©: Uhrforum.de member Badener (Andreas Kelz)
• External Link: https://uhrforum.de/threads/identifizierte-uhrwerke-die-weder-bei-ranfft-lorenz-noch-im-watch-wiki-zu-finden-sind.86322/page-27#post-3672346
• External Link 2: https://oxfordpocketwatches.blogspot.com/2017/02/rotherham-three-quarter-plate-keyless.html