I don't think the gransport 5-arm NR-copy crankset was out until about 1980. I'm fairly certain it wasn't released in the late 1970's, when the 3-arm crankset (at first steel, then alloy) was king. My 5-arm is 1983. That crankset appears on the lowly Colnago Export page.
The catalogue has to be 1978 or later because the brakes are CPSC models, as are the super record derailleurs 1978 or later.
Also, does it mean anything if several models have 4-hole front derailleurs ?? Was that a 1978-only item, or any later ??
- Don Gillies
San Diego, CA, USA