The Book of Wagner & Griswold: Martin, Lodge, Vollrath, Excelsior (Schiffer Book for Collectors)

Be sure to keep the original handle. I've never seen one of these before, the #10 iron handled round griddles go for $175+, and the 345 pattern number is not listed in the blue or red books. Based on all of that, I'm guessing your griddle is pretty rare and valuable.

Sorry to say, I have not been keeping track of Wagner toys. I've got one sales record for the 1365 skillet from 2021 selling for $51 including shipping on eBay. I purchased a bailed griddle for $30, and a waffle iron for $22 if that helps at all. The red book valuations, which can be wildly inaccurate, show the two skillets at $50-$60 each, and an aluminum handled griddle at $150-$200. The blue book shows the skillet cover at $200-$300, and it notes that it was not sold in toy sets. I would guess that means the cover is more rare. No sign of the iron handled griddle in either book.

The red book says 1940s.