The cartridge consists of a light alloy outer container complete with the propelling charge and an inner-container in which there are six star units. Running through the center of the star units is an assembly of two brass tubes with selector holes for the six choices of settings. The inner tube contains gunpowder and is closed by a plug which contains a delay pellet. In firing, the inner container is propelled and after the delay pellet has burned through, the flash passes immediately along the whole length of the inner tube, igniting and ejecting the stars in accordance with the setting.
| Overall length | 5 3/4 ins. | |
| Maximum diameter | 1.06 ins. | |
| Filling | Propellant & pyrotechnic |
| Star combinations and dial settings: | ||||||
| 3 red | 1 red | 3 red | 1 red | 2 red | 2 red | |
| 3 green | 2 green | 1 green | 3 green | 2 green | 1 green | |
| (0-2) | (7-8) | (14-15) | (21-22) | (27-29) | (34-35) | |
German: p. 325