Twofold Symmetry
Knobs with an identical pattern that is repeated only once
Collection Archive
Showing 128 Distinct Varieties
Union Hidden
F-10100
Vernacular
F-10200
Penn
F-10300
Penn
F-10310
Niles Chicago
F-10400
Vernacular
F-10500
Vernacular
F-10600
Canton
F-10700
Canton
F-10800
Vernacular
F-10900
Vernacular
F-11000
Vernacular
F-11100
Vernacular
F-11200
Reading
F-11300
Reading
F-11301
Vernacular
F-11400
Lotus
F-11500
Lotus
F-11501
Lotus
F-11510
Bouquet
F-11600
Fancy Bouquet
F-11700
Vernacular
F-11800
F-11900
Vernacular
F-12000
F-12010
Villa
F-12100
Vernacular
F-12110
Vernacular
F-12200
Vernacular
F-12201
Vernacular
F-12300
Ireland
F-12400
Modern
F-12410
Russell & Erwin
F-12420
Salem
F-12500
Arcadia
F-12600
Clark Mix
F-12700
Clark Mix
F-12701
Clark Mix
F-12702
Vernacular
F-12800
Russell Erwin
F-12810
Ireland
F-12900
Vernacular
F-13000
Robinson
F-13100
Vernacular
F-20100
Vernacular
F-20200
Nashua
F-20201
Vernacular
F-20300
Vernacular
F-20400
Corbin
F-20500
Portulaca
F-20600
Marburg
F-20700
C. 1900
F-20800
Paris
F-20900
Courtray
F-21000
Marengo
F-21100
F-21110
Marseilles
F-21200
Marseilles
F-21201
Trivoli
F-21300
Sparta
F-21400
Verdun
F-21410
F-21420
Serilly
F-21500
Turenne
F-21510
Fleur de Lis
F-21520
Madrid
F-21600
Fenmore
F-21700
Milan
F-21800
Earlton
F-21900
Earlton
F-21901
Ramona
F-21910
Ramona
F-21911
Ramona
F-21912
​
F-22000
F-22001
Castilian
F-22100
Vittoria
F-22200
Vittoria
F-22201
Voltaire
F-22300
Holland
F-22400
Holland
F-22401
Rennes
F-22500
Leyden
F-22600
Creston
F-22700
F-22730
Ygrande
F-22800
Aramis
F-22900
Mantua
F-23000
Bramante
F-23100
Bergerac
F-23200
Frontenac
F-23300
Reole
F-23400
F-23410
F-23420
Majestic
F-23500
Gravelot
F-23600
Crown
F-23700
Guerin
F-23800
F-23801
F-23810
F-23820
Schroder
F-23900
Schroder
F-24000
Schroder
F-24001
Roma
F-24100
F. C. Linde
F-24200
Monroe
F-24300
C. 1905
F-24400
C. 1905
F-24500
Jelsi or J
F-24600
F-24610
K design, Kalama
F-24620
The Thistle
F-24700
F-24710
C. 1875
F-24800
Vernacular
F-24900
Gemona
F-25100
Vernacular
F-25300
F-25310
Ravenna
F-25400
Raleigh Design
F-25500
F-25600
Corbin
F-25610
Norwalk Lock
F-25620
F-25700
Gothic
F-25800
Abronia
F-26000
F-26004