The Mosquito is very similar to the Lancaster but is a more modern version and is designed around a 100-120mm fork. It uses ovalised tubes and does away with rim brake mounts so is a bit lighter too. My frame is a medium size, top tube is 23" C-C, seat tube is 17" C-C and 19" C-Top, headtube is 4 3/4" and I was thinking to list it for £350 including black Hope headset and seatclamp.