I picked this up cheap off of Ebay this week. It is marked N3 on the Case back and Movement. I believe it to be a 1973 Jetstar. It currently is running but the day date function is not functioning properly. Tried to fix it myself and a spring went flying......bummer. I polished the crystal and case and have it looking great. Just need to send it in to a professional for service. There are some bumps on the dial. it is yellow gold plated with a gold brushed dial. Inside the case back it is blank except for a printed number 3340.
Case Serial No.