Now that is a film I haven't seen mention of in many a year. I saw it sometime towards the latter end f the 70's and I saw the remake called "I am Legend" which wasn't great imo
Anyway back to OP, quality gilt dials and Vietnamese are usually synonymous. There are a few sellers on EBay, their IDs change, but it seems the dials are manufactured in the same place. A standard ad mentions "quality Swiss ink", whatever the hell that is. The originals were galvanised, not printed. I have the contact details for a Vietnamese lady who sells dials and I understand @rolojack and @hologramet have a contact, maybe the same lady. If there isn't anything currently on eBay, shoot me a PM and I'll send you an email address to contact