A couple of months passed since I purchased two 10 MHz OCXO modules from eBay. And, to my shame, I didn’t even tried these. Yesterday I did a quick test and the devices are spot on. Both measured on my TTi TF930 3GHz frequency counter:
The OCXO needs apx 10 minutes for proper warm up in order to provide a very stable frequency. But the module is excellent. I intend to build a 10MHz reference.