I guess the Maclean photos that I have put on ebay are poor, even by my standards.
It is a good job that I build and sell bicycles, the photography thing is obviously not my speciality.
The frame is drilled for front and rear calliper brakes and I have no reason to suspect that this is a modification. There are no marks or ripples on the seat stays or fork blades, suggesting that it has never been fitted with Resilions.
The pinned construction and the style of the braze ons suggests the early 60s to me. It has brazed in bottle cage bosses, these make me think that there may have been further hot work done on this frame after it was first built. However my Jack Taylor tandem from 1965 has brazed in bottle cages and they are original. Also the Taylor that I have just posted to Mike Kone has brazed on bottle fittings and that is a 60s frame.
If any one is interested in seeing better pictures of the Macleans I can try and email them, it really is a stunningly beautiful frame. The transfers are different to Hillary's frame on the CR website. The head and seat tube is very fine and detailed with rampant dragons and faded blue colours.