I have a pair of cranks like this and they are excellent shape. The chainguard is a cheapy plastic deal that snaps in. I took it out. It looks very interesting. The crankarms say S3 on the back of crankarm. The pedals are Lyotard but I can't seem to get them off with a standard pedal wrench. Any ideas on this vintage and if they are any good? I am hoping the bolt circle is 144. It is not 130...but bigger I believe. I found this pic on the web and they are very close to what I have.

http://www.touringonbikes.us/images/beaterbike5.jpg