koenbro 

I am looking to add a pump to my recently built steel 520 tourer. Ideally something that attaches to the top tube. I do not have braze-ons and do not want to mess with the paint to add them. Prefer top-quality and I’m willing to pay for it (does not have to look expensive or techie; retro look preferred, but not important).

Any recommendations? Should I get one that has a built-in pressure gauge? Should I get one that adapts CO2 cartridges or should be manual only?

Thank you for your help.