3D printed. Very close to the original design for the 30's and 40's model. It fits Corona 4 typewriters but is slightly larger than the original but still works great with the same screw hole position.
I have been repairing and restoring typewriters for over 7 years and one of the biggest pains is when the original space bar breaks. I have yet to break any of these 3D printed replacements and they look, function and feel very similar to the original.