1944 war nickel split planchet -- the matched pair reverse half is out there somewhere

Found this a while back -- a 1944 Jefferson war nickel with an after-strike split planchet. The coin was fully struck with both sides receiving a normal impression, then the planchet split along an internal flaw. I ended up with the obverse half. The reverse, with Monticello and the large mint mark, is out there somewhere. The obverse looks like a normal coin. The other side is raw internal metal -- rough and striated with no design. In error collecting, reuniting both halves of a split planchet is called a "matched pair" and it's one of the rarer finds in the hobby. 1944 means wartime composition -- 35% silver, 56% copper, 9% manganese. That unusual alloy may have been more prone to the internal flaws that cause splits. Sold it, but I still wonder where the reverse half ended up. Would be something if it showed up on here one day.