FRAME No BICYCLE DATING. HOW OLD IS MY BICYCLE? ‘How old is my bicycle?’ is a question I get asked a lot, nearly as much as: ‘I have a bicycle that looks like one of yours; if I send you pictures please can you identify it for me?’ The answer, in short, is that I do not have time to tell you either. I’m not being callous about this. The best chance at recovering a stolen bicycle is having a registered serial number. These numbers are used by police across the nation.
List for Monark serial numbers Monark #s prior to 1941 #s deeply punched under crank housing. 3600 or under.1934 3601 to 8100.35 8101 to 9126.36 9127 to 11019.37 11020 to 30000.? 
30001 to 46001.38 46001 to 62000.39 62001 to 79000.40 79001 to 100761.41 100762 to 112911.42 112911 to 118000.? #s on aluminum tag: starting in 1946 118106 to 286500.1946 286521 to 429919.47 429920 to 539000.48 539001 to 737063.
49 737064 to 827982.50 827983 to 950701.51 950702 to 1387335. To 1911106.54 1946 -47: horn button is on left side of tank 1948-49-50: button on right side 1951- 52-53-54- small button on top right of tank 1946-49 pedestal light 1950.train light beginning 1953 single horizontal springer I double checked this info. If anyone can add anything or finds an error please amend Also,be aware if you are adding or replacing a springer fork that the forks are deeper on the post war bikes that are equipped with deep fenders.
Also the two threaded rods that the springs set on may be longer then the pre-war and early post war. Monark #s prior to 1941 #s deeply punched under crank housing. 3600 or under.1934 3601 to 8100.35 8101 to 9126.36 9127 to 11019.37 11020 to 30000.? 30001 to 46001.38 46001 to 62000.39 62001 to 79000.40 79001 to 100761.41 100762 to 112911.42 112911 to 118000.?
#s on aluminum tag: starting in 1946 118106 to 286500.1946 286521 to 429919.47 429920 to 539000.48 539001 to 737063. 49 737064 to 827982.50 827983 to 950701.51 950702 to 1387335. To 1911106.54 1946 -47: horn button is on left side of tank 1948-49-50: button on right side 1951- 52-53-54- small button on top right of tank 1946-49 pedestal light 1950.train light beginning 1953 single horizontal springer I double checked this info. If anyone can add anything or finds an error please amend Also,be aware if you are adding or replacing a springer fork that the forks are deeper on the post war bikes that are equipped with deep fenders. Also the two threaded rods that the springs set on may be longer then the pre-war and early post war. List for Monark serial numbers Monark #s prior to 1941 #s deeply punched under crank housing.
3600 or under.1934 3601 to 8100.35 8101 to 9126.36 9127 to 11019.37 11020 to 30000.? 30001 to 46001.38 46001 to 62000.39 62001 to 79000.40 79001 to 100761.41 100762 to 112911.42 112911 to 118000.? #s on aluminum tag: starting in 1946 118106 to 286500.1946 286521 to 429919.47 429920 to 539000.48 539001 to 737063. 49 737064 to 827982.50 827983 to 950701.51 950702 to 1387335.
To 1911106.54 1946 -47: horn button is on left side of tank 1948-49-50: button on right side 1951- 52-53-54- small button on top right of tank 1946-49 pedestal light 1950.train light beginning 1953 single horizontal springer I double checked this info. Nihongo 500 mon beginner pdf. If anyone can add anything or finds an error please amend Also,be aware if you are adding or replacing a springer fork that the forks are deeper on the post war bikes that are equipped with deep fenders. Also the two threaded rods that the springs set on may be longer then the pre-war and early post war. Where did you get these numbers? Do they apply to duralium Silver Kings? Like to see examples of Silver Kings by serial number to identify transitional era early bikes 34-35 that have Monark Battery Company badges or Silver King badges of which I have seen two types for 35 bikes, and window lug and non window lug frames, straight or curved truss rods, rain gutter or radius fenders, etc.