using serial number to get age of MacBook

[Sir Tokyo Sexwale]

doing an inventory of spare machines at work, I have all of the serial numbers & I know there's an app/website where I can plug those serials in & it'll give me the manufacture date but I can't remember it anymore. 

 

I thought it was the coconut app but maybe that's been updated? Because it gives me details of the machine I'm using but I want to know about 30 other machines

 

anyone help on this?

[Gethin]

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[Sir Tokyo Sexwale]

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