FS: 1950s Gubelin Steel Automatic

Here we have a 1950s steel Gubelin. The case measures 34mm, without the crown. The case back screws on, and the case is nice and thick. The watch appears all original, minus the 18mm strap. The dial has a nice spotted patina. It keeps great time, although I do not know the service history. I'm asking $300 or best offer. Returns allowed if grossly misrepresented. Please PM me with any inquiries. Thank you, Matt