Seiko is pretty easy.... 6117-8000 Just happen to have a 68... not for sale though. but I can assist you on Seiko from that period $300-800+ for a decent Seiko from Oct 68. Super easy to date them. http://www.watchsleuth.com/seikodatefinder/?mvmt=6117&case=8000&serial=802216 These run around 500 or so with a little hunting for a good one.