Baldor buffer & grinder production timeframe

[garagesapien]

Hi there, I recently purchased two Baldor units. I'm curious if there's a method to determine their manufacturing date or year based on the information provided on the decals below.
thank you!

 

[tool_scrounge]

Serial number is the date code. The last 2 digits are the year of manufacture.

 

[garagesapien]

Serial number is the date code. The last 2 digits are the year of manufacture.

Thank you!! I had no idea. i was hoping they were older than 1974