do these numbers on 1/4" plate mean anything?

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found these numbers on a piece of 1/4" plate I used for a project. do they mean anything about the type of steel or anything like that?Lincoln 225 ac (my first machine)farmhand 115vac 70amp mig/fc toymiller aead 200le (my main machine)
Reply:Does it have a slot milled into the edge ?Bubble gumTooth pixDuct tapeBlack glueGBMF hammerScrew gun --bad battery (see above)
Reply:no it doesn't it was on a basketball backboard. 2'x2' squareLincoln 225 ac (my first machine)farmhand 115vac 70amp mig/fc toymiller aead 200le (my main machine)
Reply:Serial Number of backboard ?Miller Bobcat 250Syncrowave  200Millermatic 252Spoolmatic 30ASpectrum 625 X-TremeMaxstar 150SVictor O/A torchesDewalt angle grindersWelded on/off for over 40 years.
Reply:no the post was a 6" gas main pipe from the Dayton power and light company. the plate was something they made up to hold the backboard.Lincoln 225 ac (my first machine)farmhand 115vac 70amp mig/fc toymiller aead 200le (my main machine)
Reply:maybe a batch number for the sheet of plate? kind of a way to track quality and to track production numbers are end of day?HH140---------------------------https://www.facebook.com/brandon.pike.9