Old quartz crystals
 

Andrea Baldoni ) writes:
Hello.
I want to know the name of the form factor of some old quartz crystals, used
in many receivers as 100KHz marker as well in many transmitters as frequency
generators...
They are similar in all respect to the small plug-in quartz used in
transistor based oscillators, used also these days in the solder-mount
thin-pin version, but are more or less double length, height and width.
The 100KHz version is also again double tall.


I believe the double length HC-6/U metal holders are either HC-13 or HC-33.

.... Martin VE3OAT