There were two variations on these that are apparent to me.

I have a '77 that, as I recall, was built in late 76. I've had this bike for almost 14 years. Mine has chromed socks, but un-chromed lugs, no pinstriping, and is not chromed under the paint. That's in contrast to the chromed-lug variety from a year or so later.

Mine is a double-chainringed variety, and I have no problems with 700c wheels and the OEM brakes playing nicely. I've gone through a few sets of pads, so small adjustments have never been a problem. The rims I've used have been around 25 mm outside width (several CR-18's, which are usually around 23 mm). For a super narrow rim, maybe the rear wouldn't reach. The fork crown on mine is not drilled all the way through. It's only drilled on the rear, and it's tapped for a screw. Clearly intended for a Blackburn wrap-around rack of the time, I later mounted my dynamo headlight to the NDS brake post. It can make mounting non-period things a small challenge unless you're willing to drill through the fork crown (I'm not).