Interesting Bi-metalic Transportation Token

Unc. Los Angeles,
Good for one base fare.
Nickel center in brass ring.
Any one know the years these were used?

 Issued 19 years ago ...

US bimetallic transit tokens:
CA-450BL, Los Angeles, white metal center in brass, 7 buildings and 2 palm trees, a bus and subway car, “good for base fare”; 5 million issued in 1/93; valued at $1.25



  (Quoted from a site I found)  

Thank you once again ZacUK. If I had been riding the bus, I would have known about them. I remember, I had a meter with 10 hour parking for $1.