The Yashica-Mat pictured above is one picked up on eBay, in great condition. Judging from the serial number, it appears to have been made back in 1969.
Using this camera is a real joy and the image quality is great - there's something about medium format film that no dSLR or filter can quite match... not better or worse, just a different look you get on film which I quite like. Plus, no batteries to buy, forget, or recharge!
Ah, the joys of working with what's essentially a box with a lens and some film in it... not even a light meter to help out, so you're on your own with this one, using the old 'sunny 16' and related rules, or a handheld meter (in a pinch, your digital camera makes a good meter as well).