If you find Gottlieb Snow Queen on IPDB you will see that the game has four score reels per-player. But if you look at the very last picture on IPDB you will see an example with five score reels and the picture is labeled "backglass converted to 5 digits".
Does anybody know about this conversion? Was it done at the factory or was it offered by Gottlieb as a conversion kit? You would need a different backglass to accommodate the extra digit.
I'm asking because I sold one of these a while back and it had five digits, somebody asked me about it after I posted this video in the sale ad: