Wow JP that is a beauty, and the case is lovely too - lucky you being in the right place at the right time.
So what attachments have you got? If it would help I have a booklet from 1963 that has wonderful diagrams and instructions on how and where to use the various feet from the straight forward hemmer feet, the adjustable hemmer foot, roll hemmer, the tucker and its uses, the ruffler and how to use for gathering and also pleating, the quilter, the underbraider, the sipper, the gatherer, the edgestitcher, the buttonholer, and a rug maker. If you would like further information please just ask - willing to help. Incidentally this booklet was produced by Singer and called a Manual of Family Sewing Machines, and was aimed at the schools and colleges. It also covers a lot of the earlier Singer machines and how to thread them etc. but does not include anything on a 27 or a 28. Of course if ou need anything specific Helen Howes is the person to go to.
I have yet to do anything with either of my two oldies - really just lack of time, and I want to see if I could remove the electric part of my 201-2 treadle - it has the most horrible foot control and I really want to just be able to treadle.
Have fun today and enjoy your new toy.