I believe your first letter “O” should be the number “0”.
Second, I think that looks like a Johnson plate. Note the bar code model number and serial number. I think Johnson uses all the digits, but York seems to drop the first digits. I believe the K indicates October and the “6” immediately following is 2006, so I would have guessed October 2006.
However, older cheat sheets do indicate 2001. I would probably make a call to the manufacturer to verify, but if it were new construction, I would put October 2006 in my report. Actually I wouldn’t because I don’t use months in my report, preferring year numbers only.