The front derailleur: Shimano FD-A106
Rear: Shimano RD-A105
Breaks: BK-S105
Pedals: Kyokuto Pro Vic II (Serial? KKT-PV2)
Crank arm reads Sugino Japan 165 2GC
Re: The "105" Line, I found this on a german site:
Details about the item:
I offer a complete Shimano Golden Arrow group in good to excellent condition. Golden Arrow is to say that it is the first 105er series and was manufactured between 1983 and 1986.
...
As already mentioned, all original parts from the Golden Arrow series and verziehrt by the typical engraved golden arrow. This group has become rare over time, it is technically the same time made a little after 600 and visually it surpasses that by far!
And that's the best of what I can make out.
Anything else you can tell me with that info?