This is an International Rectifier
1N630 Microwave Detector Diode for 1 to 12.4 GHz
covering L and X Bands
in a SOD-49 metal container (can)

Sourced from Hewlett Packard Loveland R&D labs. Unused, but also unboxed. 

These are factory new parts. They have never been installed and have not been recovered from manufactured electronic components.