The MIR website has a little information on the Nikkormat FTn:

You also have the option to use class "M" flashbulbs with this camera.

Last December I used an Olympus OM-1 and a Graflite with some Sylvania FP-26B flashbulbs to expose some Kodachrome 64. That combination will sync at any shutter speed up to the 1/1000 sec maximum of the camera.