Very rare equipment for pigeon racing enthusiasts: BENZING Original Brevete, racing clock and ring - Working tool

Very rare equipment for pigeon racing enthusiasts,
BENZING Original Brevete, racing watch and
Ring machine for rubber rings as D.R.P.a from 1920.

> BENZING original certification, racing watch
> Ring machine for rubber rings,
The device was developed by the Kettura company in 1920 and registered as a D.R.P.a.
> Key to knock down,
> Brass sleeves
> Rubber rings

The ring machine,
Rubber rings with a 4-digit number were developed for homing pigeons.
The rubber ring is placed on the leg of the homing pigeon and serves to identify the homing pigeon, i.e., an "identity card" for the often very valuable homing pigeons.

Instructions and function of the ring machine,
The rubber ring is placed on the device,
then spread via a mechanism of the ring machine,
then pulled over the pigeon's foot,
Now the spread rubber ring is relaxed again via a mechanism,
In the end, the homing pigeon has its "identity card" on its foot.

From my collection of cultural-historical tools