Hi Archie, Items 3, 6 and 7 will work with your camera - Item 3 is a new item so it shows you can buy what you need new. Any flash gun may fire but will have functions your camera cannot use. af flash guns have an auto focus mechanism. Your camera is manual focus therefore that function of the flash would be redundant. If you can find one - an ideal flash would be either number 3 or a Sunpak
Here are some links to suitable flash guns
http://cgi.ebay.co.uk/Sunpak-SP140-C...#ht_500wt_1182
http://cgi.ebay.co.uk/SUNPAK-AUTO-24...#ht_500wt_1182
This one may seem strange to you but is an old Pro unit that plugs into the camera - the sensor battery he mentions is easily replaced by yourself Needs two hands - very powerful and light adjustable.
http://cgi.ebay.co.uk/Sunpak-Auto-Zo...#ht_500wt_1182
This one is simpler:
http://cgi.ebay.co.uk/SUNPAK-AUTO-14...4#ht_500wt_956
And this one is probably the best of the lot for you. It is designed for manual 35mm SLR's.
http://cgi.ebay.co.uk/SUNPAK-Auto301...7#ht_874wt_941
If there are no instructions - do not be put off. Google the flash gun you are thinking of and add the word manual or instructions and in most cases someone out there will have placed the instructions or manual on the web.