I'm throwing out an APB on Dick and Dorothy's behalf. As you can see by the photo, the block has many distinguishing features and is likely one-of-a-kind. So if you see this show up on eBay, at auction, or in a private collection, know this is property of the Houdini Museum in Scranton. Anyone with information should contact the museum via the phone numbers that can be found on their website www.houdini.org.
Here's hoping somehow, some way, this comes back to where it belongs.