It’s nice to see some rare diecuts listed on eBay. This is one of two German windowpane diecuts this seller has listed now. Although this one may not be the strongest design, it is the hardest to find of the quartet. (These were produced during the 1930s, not the 1940s.) This example has the usual condition issues of border wear and wear off the high points, but is still quite nice overall. Vintage Halloween prices have been on a tear these last 12-18 months, so it will be instructive to see what this fetches.
05/09 Update: The buyer got a solid deal for $432. I’m surprised it didn’t bring FAR more. eBay is a weird marketplace.