Help Identifying Frame: Columbus Aelle (Acciaio CMn) tubes c1990

[SouthLandSapien]

Hi. This is my first post. I have acquired an old bike that I am trying to identify.

See the photos for details. It has Columbus stamped on front fork eyelets and rear drop outs. Columbus Aelle stickers on the seat tube and forks.

And a sticker with some kind of serial number on the front.

The bottom bracket has a frame number stamped on the underside of it. J2704 [Edited: After stripping the paint back, the J is actually a G.] The number, as best I can tell is G2074.

It came with Shimano parts:
Exage 300 EX front and rear derailleur;
Exage 500 EX crankset, Biopace chainwheels
7 speed cassette, on Shimano hub
Light Action SIS 7 Speed down tube levers
BR 1050 brakes with SLR quick release levers
105 Headset

Any help is appreciated.

Thanks.
PaulC

 

[otherself]

Is it Italian threaded?

 

[SouthLandSapien]

Is it Italian threaded?

No. British.

The drive side is a left hand thread. The cup that came out has stamped on it Shimano BC 1.37.

 

[otherself]

No. British.

The drive side is a left hand thread. The cup that came out has stamped on it Shimano BC 1.37.

The "j" might mean Jan Janssen.

 

[SouthLandSapien]

After stripping the paint back on the bottom bracket shell, the first letter is more like a G than a J.

So the number is G2074.

Anyone recognise that style of serial number?

Also, the blue paintjob is a repaint. Original colour was predominately white.

Cheers

Paul

 

[SouthLandSapien]

Looking at the top of the seat post stays, they are beveled. The shape and highest point at which they are brazed on to the seat post look just like a some of the Japanese built Columbus frames that were found on Schwinn models in the 1980-1990 era..

I'm in Australia, so not sure if this is a Schwinn or not, but it is close.