That's a 1989 Squier MB4 bass made in the Young Chang factory in Korea, at the same time they were making Fenix brand guitars and basses. There was an MB4 model that was similar and black, but it had a skull and crossbones on it, and a different headstock.
Yours is worth $10 less than the skull and crossbones model, and is valued at: Mint Condition: $170 Excellent plus: $145 Excellent: $125 Very good plus: $100 Very good: $80 Good: $65Here's a posting on another website by a guy who owns one just like it: Porter, I love the photo of The Beatles on your wall.
Production dates have been penciled or stamped on the butt end of the heel of the neck of most guitars and basses.
There were periods of time when this was not consistently done, (between 19), and there are certainly other examples of short periods of time, and individual pieces, where the dating was simply omitted.
The Fenix brand Squiers, from what I know or thought I knew were contracted to Young Chang Fenix (a manufacturer) by Fender. I have a mate here who is from south of you, near Brighton.