BSAOC
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BSA Machine Numbers All models from 1931 until 1940

Year Model Eng Start No Frame Start No CC
19312.49 HP B31 -1Y1.101Y1.101250
19312.49 HP B31 -2 OHVY2.101Y1.101250
19312.49 HP B31 - 3 OHV DE LUXEY3.101Y3.101250
19312.49 HP L31 - 5 POST OFFICEYT.101Y5.101250
19313.49 HP L31 - 4 Y4.101Y1.101350
19313.49 HP L31 - 5 DE LUXEY5.101Y5.101350
19313.49 HP L31 - 6 OHV DE LUXEY6.101Y5.101350
19314.93 HP S31 - 10 OHV DE LUXEY10.101Y7.101500
19314.93 HP S31 - 7 Y7.101Y7.101500
19314.93 HP S31 - 9 OHVY9.101Y7.101500
19315.57 HP H31 - 8 DE LUXEY8.101Y7.101550
19317.70 HP E31 - 11 TWIN 2 GALLON TANKY11.101Y11.101750
19317.70 HP E31 - 11 TWIN 3 GALLON TANKY11.101Y11A.101750
19319.86 HP G31 - 12 TWIN WORLD TOURY12.101Y12.1011000
19322.49 HP B32 - 1 OHVZ1.101Z1.101250
19323.49 HP L32 - 2 Z2.101Z1.101350
19323.49 HP L32 - 3 OHVZ3.101Z3.101350
19323.49 HP L32 - 4 DE LUXE HAND CHANGEZ4.101Z4.101350
19323.49 HP L32 - 4 DE LUXE FOOT CHANGEZ4.101Z5.101350
19323.49 HP L32 - 5 OHV BLUE STAR HAND CHANGEZ5.101Z4.101350
19323.49 HP L32 - 5 OHV BLUE STAR FOOT CHANGEZ5.101Z5.101350
19323.49 HP L32 - 5 OHV DE LUXE HAND CHANGEZ5.101Z4.101350
19323.49 HP L32 - 5 OHV DE LUXE FOOT CHANGEZ5.101Z5.101350
19323.49 HP L32 - 5 OHV BLUE START HAND CHANGEZ11.101Z4.101350
19323.49 HP L32 - 5 OHV BLUE STAR FOOT CHANGEZ11.101Z5.101350
19324.99 HP S32 - 8 OHV DE LUXEZ8.101Z8.101500
19324.99 HP W32 - 6 FOOT CHANGEZ6.101Z7.101500
19324.99 HP W32 - 6 HAND CHANGEZ6.101Z6.101500
19324.99 HP W32 -7 OHV BLUE STAR FOOT CHANGEZ12.101Z7.101500
19324.99 HP W32 -7 OHV BLUE STAR FOOT CHANGEZ7.101Z7.101500
19324.99 HP W32 -7 OHV BLUE STAR HAND CHANGEZ12.101Z6.101500
19324.99 HP W32 -7 OHV BLUE STAR HAND CHANGEZ7.101Z6.101500
19324.99 HP W32 - 7 OHV FOOT CHANGEZ7.101Z7.101500
19324.99 HP W32 - 7 OHV HAND CHANGEZ7.101Z6.101500
19325.57 HP H32 - 9 DE LUXEZ9.101Z8.101550
19329.86 HP G32 - 10 Z10.101Z10.1011000
19332.49 HP B33 - 1 A1.101A1.101250
19332.49 HP B33 - 2 OHV S.P.A2.101A1.101250
19332.49 HP B33 - 3 BLUE STAR JUNIORA3.101A3L.101250
19333.48 HP R33 - 4 OHV A4.101A4.101350
19333.48 HP R33 - 5 OHV BLUE STAR HAND CHANGEA5.101A4.101350
19333.48 HP R33 - 5 OHV BLUE STAR FOOT CHANGEA5.101A5.101350
19334.99 HP W33 - 6 A6.101A4.101500
19334.99 HP W33 - 6 POST OFFICEA6.101A6.100500
19334.99 HP W33 - 7 OHV A7.101A4.101500
19334.99 HP W33 - 8 OHV BLUE STAR FOOT CHANGEA8.101A5.101500
19334.99 HP W33 - 8 OHV BLUE STAR HAND CHANGEA8.101A4.101500
19334.99 HP W33 - 9 OHV SPECIAL HAND CHANGEA9.101A9R.101500
19334.99 HP W33 - 9 OHV SPECIAL FOOT CHANGEA9.101A9L.101500
19335.95 HP M33 - 10A10.101A10.101600
19335.95 HP M33 - 11 OHVA11.101A10.101600
19339.86 HP G33 -12 TWIN LIGHTA12.101A10.1011000
19339.86 HP G33 -13 TWIN WORLD TOURA13.101A13.1011000
19339.86 HP G33 -13 TWIN WAR OFFICEA14.101A14.1011000
19341.49 HP X34 - 0 OHVB150.101B1.101150
19342.49 HP B34 - 1B1 .101B1.101250
19342.49 HP B34 - 17 OHV SPORTSB17.101B3.101250
18342.49 HP B34 -2 OHVB2.101B1.101250
19342.49 HP B34 - 3 BLUE STAR JUNIORB3.101B3.101250
19343.48 HP R34 - 4 OHVB4.101B4.101350
19343.48 HP R34 - 5 OHV BLUE STARB5.101B4.101350
19343.48 HP R34 - 6 OHV SPECIALB6.101B6.101350
19344.99 HP W34 - 7B7.101B7.101500
19344.99 HP W34 - 8 OHVB8.101B4.101500
19344.99 HP W34 - 9 OHV BLUE STARB9.101B4 .101500
19344.99 HP W34 -10 OHV SPECIALB10.101B6.101500
19344.98 HP J34 - 11 OHV TWINB11.101B11.101500
19345.95 HP M34 - 12 B12.101B12.101600
19345.95 HP M34 - 13 OHV B13.101B12.101600
19349.86 HP G34 - 14 TWIN WORLD TOURB14.101B14.1011000
19351.49 HP X35 - 0 OHVE0.101E1.101150
19352.49 HP B35 - 1 E1.101E1.101250
19352.49 HP B35 -2 OHVE2.101E1.101250
19352.49 HP B35 - 3 OHV DE LUXEE3.101E3.101250
19353.48 HP R35 - 4 OHV DE LUXEE4.101E3.101350
19353.48 HP R35 -5 OHV BLUE STARE5.101E5.101350
19353.48 HP R35 - 17 OHV TWIN PORTE17.101E5.101350
19354.98 HP W35 - 6 E6.101E6.101350
19354.98 HP J35 - 12 OHV TWINE12.101E12.101500
19354.99 HP W35 - 7 OHVE7.101E5.101500
19354.99 HP W35 - 8 OHV BLUE STARE8.101E5.101500
19354.99 HP W35 - 9 OHV SPECIALE9.101E9.101500
19355.95 HP M35 -10E10.101E10.101500
19355.95 HP M35 - 11 OHVE11.101E10.101600
19357.50 HP J35 - 15 OHV TWIN WAR OFFICEE15.101E15.101750
19359.86 HP G35 - 14 TWINE14.101E14.1011000
19361.49 HP X0 OHVD0.101D1.101150
19362.49 HP B1D1.101D1.101250
19362.49 HP B18 OHV LIGHT DE LUXED18.101D1.101250
19362.49 HP B2 OHVD2.101D1.101250
19362.49 HP B3 OHV DE LUXED3.101D3.101250
19363.48 HP R4 OHV DE LUXED4.101D3.101350
19363.48 HP R17 OHV D17.101D6.101350
19363.48 HP R19 OHV COMPETITIOND19.101D3.101350
19363.48 HP R20 OHV NEW BLUE STARD20.101D6.101350
19363.48 HP R5 OHV EMPIRE STAR3D5.101D38.101350
19363.48 HP R5 OHV EMPIRE STARD5.101D8.101350
19364.96 HP Q21 OHV NEW BLUE STARD21.101D6.101500
19364.96 HP Q7 OHVD7.101D6.101500
19364.96 HP Q8 OHV EMPIRE STAR3D8.101D38.101500
19364.96 HP Q8 OHV EMPIRE STARD8.101D8.101500
19364.98 HP J12 OHV TWIND12.101D12.101500
19364.99 HP W6 D6.101D6.101500
19365.95 HP M10 D10.101D10.101600
19367.48 HP Y13 OHV TWIND13.101D13.101750
19369.86 HP G14 TWIND14.101D14.1011000
1937B20 TOURERHB20.101HB20.101250
1937B21 OHV SPORTSHB21.101HB20.101250
1937B22 OHV EMPIRE STARHB22.101HB20.101250
1937B23 TOURERHB23.101HB20.101350
1937B24 OHV EMPIRE STARHB24.101HB24.101350
1937B25 OHV COMPETITIONHB25.101HB24.101350
1937B26 OHV SPORTSHB26.101HB24.101350
1937M19 OHV DE LUXEHM19.101HM19.101350
1937M20 TOURERHM20.101HM19.101500
1937M22 OHV SPORTSHM22.101HM19.101500
1937M23 OHV EMPIRE STARHM23.101HM19.101500
1937M21 TOURERHM21.101HM19.101600
1937Y13 OHV TWINHY13.101HY13.101750
1937G14 TWINHG14.101HG14.1011000
1938B20 TOURERJB20.101JB20.101250
1938B21 OHV SPORTSJB21.101JB20.101250
1938B22 OHV EMPIRE STARJB22.101JB20.101250
1938C10JC10.101JC10.101250
1938C11JC11.101JC10.101250
1938B23 TOURERJV23.101JV20.101350
1938B24 OHV EMPIRE STARJV24.101JV24.101350
1938B25 OHV OMPETITIONJV25.101JV24.101350
1938B26 OHV SPORTSJV26.101JV24.101350
1938M19 OHV DE LUXEJM19.101JM19.101350
1938M20 TOURERJM20.101JM19.101500
1938M22 OHV SPORTSJM22.101JM19.101500
1938M23 OHV EMPIRE STARJM23.101JM19.101500
1938M24 GOLD STARJM24.101JM24.101500
1938M21 TOURERJM21.101JM19.101600
1938Y13 OHV TWINJY13.101JY13.101750
1938G14 TWINJG14.101JG14.1011000
1939B21 DE LUXEKB21.101KV20.101250
1939B21 STANDARDKJB21.101KJB20.101250
1939C10 DE LUXEKC10.101KC10.101250
1939C10 STANDARDKJC10.101KJC10.101250
1939C11KC11.101KC10.101250
1939B23 STANDARDKJB23.101KJB20.101350
1939B25 COMPETITIONKB25.101KB24.101350
1939B26KB26.101KB24.101350
1939B23 DE LUXEKB23.101KB20.101500
1939B24 SILVER STARKB24.101KB24.101500
1939M20 DE LUXEKM20.101KM20.101500
1939M20 STANDARDKMS20.101KM20.101500
1939M22 STANDARDKJM22.101KJM19.101500
1939M23 SILVER STARKM23.101KM23.101500
1939M24 GOLD STARKM24.101KM24.101500
1939M21 KM21.101KM20.101600
1939G14 TWINKG14.101KG14.1011000
1940C10WC10.101WC10.101250
1940C11WC11.101WC10.101250
1940B29 SILVER SPORTSWB29.101WB27.101350
1940C12WC12.101WC10.101350
1940W.D. B30WB30.101WB30.101350
1940M20WM20.101WM20.101500
1940M23 SILVER STARWM23.101WM20.101500
1940W.D. M20 WM20.9719WM20.9719500
1940W.D. M20 WM20.14439WM20.14439500
1940W.D. M20WM20.18899WM20.18899500
1940W.D. M20WM20.23039WM20.23039500
1940W.D. M20WM20.27039WM20.27039500
1940M21WM21.101WM20.101600
1940G14 TWINWG14.101WG14.1011000