How do I find out when my Trip was manufactured?

This information was provided by "Mairead" via the forum on my website olympus-trip.co.uk. There is an explanation of what to do and how the code is deciphered on - flickr.com but I thought some pictures would help to explain how to do it. Don't be worried about removing the pressure plate. Just slide it inwards carefully with your nail as shown until it comes free from one side, then rotate it to reveal the printed code. It is replaced just as easily in the same way.

The code can be seen here. H92 = February 1979. I had thought we had bought the camera in 1978 but this proves that my memory is fading!