Your warmblood's brand and registration number not only help you identify your horse, but they give you information about when and even where your horse was born. My Arabian mare, Montoya DSA had a very interesting brand that I've already written about, and so did Sydney, my New Zealand Thoroughbred.
Izzy's Registration Number:
The next character, a 4 in Izzy's case, indicates when the horse was born. The number 3 signifies a horse that was born before 1999, while a 4 shows that the horse was born after 2000.
The next two characters, the 51 in Izzy's number, refer to his German Breeding District. While not born in Germany, Izzy is registered with the RPSI whose home is the Rheinland Pfalz-Saar region of Germany.
The last two digits of the Registration Number indicate the actual year of birth. Izzy was born in 2008, so his final two numbers are 08. The two numbers before his birth year, 36, are the final digits of his seven-digit individual Registration Number, so they are included in his brand.
Just like cracking a code! I think it's a pretty interesting system.