Nishiki century sugino bike dating
19811981 700 MX-II 4130 frame & down tube decals, Vbars & Redline stem. As in the earlier years no decal Identifying the bikes as 600 or 700 etc is on the bike yet. Mostly black with some grey & red Redline written several times.1984 700 P - 4130 Proline frame, same frame that the Carerra comes with. RA 04320 - 1982 Redline MX (Made in Japan, Redline Hotdog stamp)RB XXXX - 1982 Redline MX-IIRB 01382 - 1984 Redline 102b (May possibly be a 82 or 83) (Redline Hotdog stamp)RB 01693 - 1982 Proline II (has No gusset behind seat, CS bridge)RC 01878 - Unknown Year, (maybe 600a) MX-II or III (Redline Oval stamp)RC 06430 - 1984 Redline 600b RC 07870 - 1984 Redline MX-III(ST-20), (has gusset behind seat, Redline Oval stamp)RC 07631 - 1984 Redline 600b (Redline Oval stamp)RC 09325 - 1984 Redline Proline (Redline Oval stamp, CS bridge)RC 09858 - Unknown Year, Redline Proline (has NO gusset behind seat, Redline Oval stamp, CS bridge)RC 13645 - 1984 Redline 700p RE 00533 - 1985 Redline 800p RH 00726 - 1983 Redline 600a (Redline Oval stamp, NO CS bridge)RH 07118 - 1983 Redline 600a RH 00250 - Unknown Year, Redline 102b RI 0394X - Unknown Year, Redline MX-II or III (claims top tube is 17" but they only came in @18 & 18 3/4)RI 05788 - Unknown Year, Redline MX-II or IIIRJ 00829 - Unknown Year, Model RJ 02630 - Unknown Year, Model RJ 03295 - Unknown Year, Model RJ 05818 - 1980 MX-III (MX-III was a MX-II frameset sold as a complete bike that came from Japan)9 Digits, Letters & Numbers WA9F01870 (1999, June)WN0C05414 (2000, March) Redline 340WN0C07804 (2000, March) Redline 340WV9G05080 (1999, July)The third number appears to be the year in this case 1999. Speculation is that if it has the stamp it is made overseas.
The first number following the S1 is the model year: 1 1981.If you can add to this, make corrections please do.Unfortunately almost no one posting serial numbers posted pics or posted bike that posted the serial number.Available only in Chrome at first with red or blue parts packages.1981/1982 700 Now using a first generation MX-III frame which is really a MX-II. Everything else same for 600.1981/1982 600 Now using a first generation MX-III frame which is really a MX-II. Both available in Chrome, Red, White, Blue or Black. Series-IIIEarly MX-III were the designation for complete MX-IIs from Japan. )104A forks(A as in all weld instead of the three spot? The lower the number the earlier it was made, starting in 1979.The first MX-III frames confused people so Redline also called them Series 3, ST(as in ST-20), Series Three etc. Some model years started earlier & this throws off the fluid look.I have not seen any other posts with a similar serial number format. The date codes data is generally stamped on the drive side dropout.