I have come across images of a postcard with the Wirt home, and also a picture from 1950 when the property was sold.
Text from the page bearing the photo below, which states the photo is from 1950: “The Wirt Mansion, First Street, was recently purchased by Basil Robbins. Federal revenue stamps indicated the transaction was made in consideration of $40,000. The residence was erected by the late Paul E. Wirt, fountain pen inventor.”
If you are in the area and so inclined, I even found a walking tour of Bloomsburg PA, which feature two stops with Wirt pedigrees, #14 and #36