Effective september 1 2020 the ## are starting with 10.
Just add 10 to get to the year of production.
So today an EL 10x42 with ## KD1010130A came in and AFAIK (and been told) just the two first digits count.
Thanks, Jan, very useful info. I can understand why they decided to not use digits 3 and 4 for the week (they need those two digits for the serial number itself), but I am not sure why they have changed the rule for the year of production. In particular why not indicate the year directly, such as KD20xxxxxA? Btw, I seem to remember that the letter at the end of the SN has a certain meaning, do you know what it indicates?
I have seen an NL 8x42 whose serial number was A90xxxxx, so still the old rule of adding 30. Any idea why the new SN style that you mentioned was not used in this case? Maybe because the binos were produced prior to the introduction of the new rule on Sept 1st?
. . .
Jan has provided the following examples . . .
• EL 10x42: KD10 10130A . . .
• EL 8x32: FD10 10121A . . .
• ATX module: HA10 10198A . . .
Likely Construction? - ‘PTyy nnnnnL’
So . . . it seems likely the numbering pattern is as follows:
P = product/ product line (the same as was previously used e.g. K for EL x42, F for EL x32, and H for X series telescope modules)
T = type of product (the use of a letter instead of a restricted number range e.g. now D for full size roof prism binoculars and A for telescopes)
yy = year of production (add 2010)
nnnnn = consecutive number (likely an unrestricted sequence from 10,000 on)
L = location of manufacture, or assembly or numbered component replacement (A for Absam/ Austria, and another letter or letters for SONA)
. . .