2 Vintage 5" DuckPin Blue Swirl Bowling Ball Set Duck Pin Dirty Dings

Direct from the epicenter of the origin of Duckpin bowling (Baltimore) and these are an unbranded matched set of bowling balls.  Each measures a full 5" with individual weights of ~3 lb 7 ounce and ~3 lb 11 ounce.  I don't want to make a statement or promises of how useable this set is as I never used them personally.
The photos, after the first one showing the set; are at least 6 photos for each ball.  Turned each 1/4 turn for the first 4 and then turned them on their other axis to show top/bottom of each ball.
Shipping weight of 8 lb with the worst case would be $18.40 shipping in a Priority Medium Flat Rate Box.  It could be cheaper so please check the other options show in the listing.
I have a second pair listed and if interested in both sets, they can be combined in the Large Priority Flat Rate Box.