Sekine Serial Numbers
Does anyone have any old data to be able to determine the year of a Sekine SHT from its serial number?
Y1138511 is stamped on my frame, I keep getting asked how old it is and can only give a rough answer.
Are there any old catalogues that a person can purchase get a copy of?
I've being trying to build a sekine serial number data base for just that purpuse and am fairly knowledgeable on Sekine. Based on very limited data, my current thinking is that your frame was made around 1975/1976. It may be a tad too old to have date codes on any of the Shimano erquipment, but you should find date codes on the crankset, handlebar stem, seat post and handlebars (if you're willing to unwrap the tape. I'd appreciate this data and some pics.
I've put a simple website together on the bike:
I had the bike totally apart and took lots of shots. I'll look for more dates and numbers on the shimano gear and tell you any numbers I find.
Thanks for the reply,
Finally jotted down the serial number on my Sekine and checked out the provided links as well as previous discussion on these bikes and I'm a little stumped as to it's model/age.
If necessary, I'll get some close-up pics for detail. The serial number on the frame bottom looks to be '2074E6'. I say "looks" since the 'E' is stamped more like an upside and backwards 'F' but I think that's just a tooling mistake since the '4' and the '2' are very clearly stamped.
The components I believe are original. Rear derailleur is 'Shimano RS' front derailleur is 'Shimano FE'. Neither appear to have anything else written on them. The sticker on the seat tube does not have the World's Finest Bike or anything simular. It's a large sticker, silver with black details. It has the CS logo and underneath says "Made By Sekine Canada, Ltd." near the base of the post by the bottom bracket it has another sticker saying "Made In Canada".
The headbadge does not match the ones described or photographed. It's metal, shaped like a shield with a maple leaf in the middle and "Sekine" underneath. The leaf is filled with red and the backing shield has been painted white. It does not have a little jewel of any sort (or anywhere for one to go) nor is it a cheap sticker - this is a real metal badge, just totally different than listed here.
The paint seems to be a dark-redish-brown in areas which haven't faded, and the cable housings seems to have been red before fading as well. Lugging is pretty simple.
Any ideas from those who know these bikes?
The derailleurs indicate that it is probably an RM-40. I believe those derailleurs came out in 1978 or 1979, but they were used though the early 1980s. Funny, looking at the serial number, my educted guess would have been 1976 or 1977. Regardless, the bicycle is modern enough that it should have the two letter date codes on the back of the derailleurs, which you can decode using the info at http://www.vintage-trek.com/component_dates.htm . The bicycle's model year is usually within one year of those date codes.
Originally Posted by Novakane
I cannot guarantee the components are original, it was an assumption based upon looking at the bike when cleaning it. There's no marks from a lengthy time with a different bracket, and the paint is faded around the shapes of the components that it came to me with. If they aren't original then they've been on it for most of it's existence.
Originally Posted by T-Mar
The Shimano FE (the forward derailleur) seems to indicate it was made in April 1980 'ED'.
I cannot find the date code on the Shimano RS (rear derailleur) and I can't take it apart to look at the moment.
The stem has 'AP70' on the sides.
Rear hub is Shimano VIA which matches what it says on the derailleur.
Crankset is Takagi with the numbers 509 and 165 on the arm, and they aren't the cottered type typical on these older bikes.
Brake calipers are center-pull Chang-Star and I cannot find any date or other stamped codes on them.
All and all, the components are very common and average for the era. Nothing top-of-the-line that I can see.
Were there Canadian built Sekine's in 1980? It is entirely possible that someone changed the components after 1979... before 2006 when I got the bicycle. I will talk to the person who gave it to me, but the only thing I know of it's history was that her husband used to ride it, then got a new bike and this one was left to rust outside for the past two or three years.
I've attached a photo of the bike. You can see the different head-badge than I've seen elsewhere on these bikes, and the slightly different seat-post sticker. Any help would be appreciated.
Yes, it appears to be an RM-40. A you surmised, there is nothing top of the line. In fact, it is bottom of the adult bicycles offered by Sekine, but still a very a good value. The derailleurs are almost certainly original, as are the rest of the components. The front derailleur code suggests a 1980 or 1981 model, which is about right, based on the pic. Yes, Sekine was still manufacturing in Canada in 1980/1981.
I'm surprised that you couldn't a date code on the rear derailleur. It should on the back of the inside parallelogram arm, facing the wheel. The stem may have a date code, but it is probably below the insertion mark, so you may have to remove the stem to see it.
Well, there's only so much craning around I can do while at work, and getting at the inside parallelogram arm, facing the wheel will require me to twist around in a way that I might get strange looks while here.
Originally Posted by T-Mar
Getting a code from the stem will be a chore since it's seized in the tube at the moment. Still working on how to get it loose without destroying something.
Thanks very much! It was actually searching for info on this bike which brought me to discover this forum in the first place. So, an RM-40 made in 1980-1981. Good to know, particularly the year. I can take some close up photos of the head badge and other distinctive details for those compiling Sekine model and variation data if it is wanted?
Any information on colour schemes that the RM-40 would have come with? I'm thinking of repainting it during the off season. Given that it's a low-end '80s model I'm not as worried about the loss of decals than I would have been had it been 10 years older.
Other colors were pearl white and pearl blue. The color chip looks like a royal blue.
Originally Posted by Novakane