Tubs

I am new to the world of tubular wheels. I have recently bought a tubular Wheelset from the 70s. They are Super champion record rims which are 700c with a rim height of 12.3mm,rim width 21.5mm.

Classic rims. These were later sold as Wolber.

What I would like to know is - what type of tyres would you recommend and what are the basics of fitting the tyres and any pitfalls

Any nice tubular tyre. Loads to choose from.

to avoid, Do I need to find vintage tubs to match the vintage rims?

Any tubular tyre in 27"/28" will fit. Does not matter if it was made yesterday, last year or in 1955

Any help/advice is greatly appreciated or please point me in the right direction of websites which will cover the basics to get me up and running.>

There are loads of guides around... Just do a search.
For example: http://sheldonbrown.com/brandt/mounting-tubulars.html