ID: 
2103
Maker's Name: 
Unk
Dimensions: 
6 × 3.5 × 11.2 cm

Spiral glass tube with electrodes each end, and external connecting pins. Probably Xenon filled. Produces a daylight white flash when a capacitor is discharged thru it. The flash is initiated by a metal spiral wound around the tube, pulsed at a high voltage thru a trigger transformer.