Well, I've discovered yet another Torben Holmbäck Desk accessory. The set also includes a Tape Block (https://www.thingiverse.com/thing:7018881), two different Pencil Blocks (https://www.thingiverse.com/thing:7123447), the Desk Organizer Block (https://www.thingiverse.com/thing:7123467), the Clips Block (https://www.thingiverse.com/thing:7135540), and the Pad and Pencil Holder(https://www.thingiverse.com/thing:7135685). I found this one on the Cooper Hewitt, Smithsonian Design Museum website (https://collection.cooperhewitt.org/objects/18648651/). Just a simple letter opener. All of the originals were made of black anodized aluminum. I haven't printed this yet but will post pictures when complete.