Researching my set which are marked 'War Finish', I can't find any reference to this elsewhere, so, I'd appreciate some help with a few questions:
I assume they are Series 1, uncoated, as one is 35mm.
Obviously 1939-45 approx., but would there be any more accurate dating for that labelling?
What does WF imply? They're normal black gloss but would they be any lesser quality because of the war need?
Are there any published serial number ranges for the various types?
They have just a basic 1mm-pitch thread. What is the designation of this and was it standard for these early types before adapting to other mounts?
Any help will be much appreciated.