Not much to go on with this one gleaned from ebay.
The build components include under BB cable guides and under chainstay rear derailleur cable guide and stop. Other braze-ons are DT Campagnolo changer bosses, bottle cage bosses and TT cable guides. The curved seatstay bridge is reinforced. The Prugnat lugs appear to be short spearpoint type. Fork crown is Cinelli style and the full wrapover seatstays have the double fishtail motif. Campag headset.
Major Nichols lightweight racing cycles 
I am the proud owner of this bicycle, now built up and on the road
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Looking very nice…did you get the bike resprayed or just cleaned up well?
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Just cleaned it up. A bit scabby around the chain stays. The paint is only original once, I wished to preserve the patina. Each blemish has its own story to tell
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