Here I have two more pics of particular frame features. The 1st is showing the cut out 'M' of Miyata the 2nd shows one of the Shimano dropouts:
The cableguides on top the bracket are Shimano too.
Another roadbike in my collection, the '91 GentsRacer Carbolite:
In the foreground a SkyExpension (Elevation 12,000 in the US, Elev12k
) can be recognized.
- Melvin