Osram & Wotan(Eur) up to 1993- 3 character code
This calculator gives up to 2 possible options of what that date might be, depending on which decade the lamp was made in- you'll have to decide which one applies most closely to the lamp in question. All this does, is remove the need for you to do the maths of which code is which date.
This should be 3 letters or 2 letters and 1 number, and covers lamps made from 1960 (see below though) to 1993.
It's important to enter the case of the letters exactly as on the lamp, as this will affect the result.
Info from an email by Colin Grimes to StreetlightingUK, May 2009.
This should be 3 letters or 2 letters and 1 number, and covers lamps made from 1960 (see below though) to 1993.
It's important to enter the case of the letters exactly as on the lamp, as this will affect the result.
Info from an email by Colin Grimes to StreetlightingUK, May 2009.
James Hooker made the following comments about this sequence:
"The dates you are generating only work back to 1974. Prior to that there was a different 3-letter system which is giving the wrong results, because then the first factory ID was combined with a quarterly code, which runs on a different cycle."
Unfortunately I don't have the info to generate that sequence of codes.