Never looked that far into these thingsFirst 2 digits = diameter in mm, last 2 = thickness in tenths of mm, so a 2016 is 20 mm diameter and 1.6 mm thick.
As you say, easy when you know and knowledge is a light burden.Never looked that far into these things
Easy when you know
Great place these forums
Learnt something new today ........ tick :thumb:
might be handy in future ? pub quiz / millionaire/ etc
need a battery ?? :lol: