I have a Rory O'Brien Championship frame that (according to the transfers) was renovated by Frank Lipscombe. It would have been made sometime between 1948 and 1969. Looking for suggestions from anyone who can narrow down the year based on features on the frame - e.g. grease nipple on bottom bracket, no braze-on for shifters, etc. Renovation makes it tricky since I have no idea what was added then vs being part of the original build. Suggestions anyone :?: