Summit County Relief Model

I was doing some plat research at the Summit County Courthouse this week, when I noticed this really interesting Summit County Relief Map on display

You really need to view the full image to fully appreciate it.  It's a map of Summit County, but with actual relief instead of contours.  The Cuyahoga River valley is obviously very prominent.

I'm not sure when it was made - I didn't see a date anywhere on the model, and I didn't see an explanatory sign anywhere.  I would guess it's from sometime between 1880 and 1910.  It was hard to get a really good photo because it's behind glass; it appears to be a temporary display by the Summit County Historical Society.  I think I should make a trip over there sometime to see if I can get a better look at it!

Summit County Relief Model