FUNNY, I JUST HAD A CUSTOMER CALL AND ASK ME ABOUT THIS SLOT THIS MORNING listed in the Northern California area, I believe!
First of all Jennings never made a slot machine with the name "Skyscraper" that I am aware of, it was Mills that made the SKYSCRAPER in, I believe 1932 and 1933, this model shown here in the picture below recently came thru my shop for a full restoration and sale and is the "2 Plays for a Nickel" version.
Notice the difference in the front jackpot configuration as Mills used primarily, reserve over main jackpot.
The so-called Jennings "Sky Scraper" has the side by side Jackpot.
This seems to be some sort of "Revamp" but personally I have never seen one like this before, but I learn everyday that in 40 years I have not seen everything in this hobby.
If I am wrong in the statements above someone please let me know.