Maybe I missed this somewhere along the line... Can someone explain Lionel's product number scheme. Why 6-xxxxx vs 19xxxxxx. and within these numbers are there any identifiers as to scale vs traditional lines?
thanks for any insight here
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In 2019 or so they started to use the year as the first two digits of the model number. Not sure if the 19 represents catalog year or manufacture year. The newest items will start with a 20.
Someone will post a list here soon. I don't have it on this computer. They changed to show the year first then the next 2 digits would be the size and a whole list of other things Then the balance is the product. So a 1933372 is a 19 year - 33 scale size diesel - 372 Santa Fe GP 35.
Beware
Lionel world is a strange place. There was a recent thread asking members to post pictures of their standard O cars. I did and was shortly told that mine didn't qualify as it wasn't from the 80's or 90's. I ran the product number and Lionel had cataloged it as standard O, but the Lionel community said it wasn't worthy. 
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