That is a lovely bike, but i cant help you with the model.
As a guideline of weight i have a 25" 1982 raleigh competition (full 531 frame & forks) and it weighs 22.5lbs.
But mine has campag gears & wheels, with weinmann brakes which may be lighter than the 600 groupset, i wouldnt know. It weighed 19.4lbs minus the tyres, tubes, chain & pedals.
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