I have a similar Galaxy from same decade early 70s. The decal is the same on the down tube. I don't know which year they started fitting centre pull brakes, mine are side pull. Those giant gear levers look really useful but clearly not a standard fit. Everything on this bike apart from the frame needs to be replaced except perhaps the brakes and bar. The Brook saddle looks pretty weathered and uncomfortable - I'd flog that on Ebay where you'll get a good price to invest in a decent gel saddle. The Chainset, derailleurs and chain and block all need replacing. The bearings all need servicing and possibly new wheels and tyres etc. Personally I think overall the cost doesn't justify the value of the bike. Even with all that work it still wouldn't ride as good as a modern equivalent. My one had some work done before I purchased it on Ebay which (I guess) as an abandoned project and it is somewhat cleaner and more promising than yours. Even so it's cost me an arm and a leg already and it's no where near ready to ride on the road. For example, I fitted Cinelli wider drop handlebars and with a view to testing the position of the brake levers (I have kept the originals plus suicide levers) before applying new Cinelli tape, I took it over to a quiet car park only to have the rear mech whip up into the wheel spokes and nearly throw me on the ground! So that's a new Shimano to add to the list!!! Most if not all of the moving parts on a 1970s bike are past their sell by date - including me the rider! I had one of these brand new in 1972 for my 18th Birthday starting college, it was my pride and joy, so it's a purely sentimental trip for me with no expectation that any restoration will ever turn it into a practical machine or even medium touring bike.