Orange serial number query O2 EVO

2manyoranges

Old School Grand Master
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I thought I understood Orange serial numbers but I have this O2 EVO frame hanging around which has two numbers on it, which don’t seem ti follow the same rule as early steel frames (first digit year, second two month).

Anyone with any ideas?

First number
M191201293

Second
A410-8

Grateful for any help
Thanks
Tim
 
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