Asking $675, head only. Up for sale is this Omega Jumbo 2539-2 Cal. 361, I could only find one other 2539 online. Watch was just overhauled with a complete service, new crystal and new crown. Dial and hands appear to be original and dial shows patina. I don't have an exact measure of the case but I estimate that it's around 37-38mm. It's shown next to a Speedmaster for size. If you have any questions feel free to pm me! Sold head only, takes a 20mm strap.