What is the value of a 1967 dollar bill with no serial number?

zilch - without a serial number it's not money

of course if it were a real error bill, the sky's the limit. but only to a collector.

Correction

It's still "real money" but yes, it would be worth far more to a collector. However, the value depends among other things on which country issued the bill. It can't be from the US because there are no US bills dated 1967. Please post a new and separate question with the bill's country of origin.