The postage stamps of the Kingdom of Bavaria from 1867-1868 are renowned for their rarity, historical significance, and value. During this period, Bavaria, still an independent German state, issued stamps that hold a special place in the world of philately. Among these, the 6 kreuzer blue, 6 kreuzer brown, and 3 kreuzer lilac stamps stand out as highly coveted by collectors due to their scarcity and importance.

### 6 Kreuzer Blue and Brown
The 6 kreuzer stamps, printed in both blue and brown, were essential denominations in the Bavarian postal system. The blue 6 kreuzer stamp was mainly used for international mail and is now extremely rare, often selling for high prices at auctions due to its limited surviving examples. The brown version, although slightly more common, is also valuable, particularly in mint condition. Both stamps were part of the numeral series, featuring the denomination prominently in the center, framed by intricate borders. These stamps were printed on thick, unwatermarked paper, a characteristic that adds to their unique appeal among collectors.

### 3 Kreuzer Lilac
The 3 kreuzer lilac stamp, printed in a delicate purple shade, was another key issue from this period. It was used primarily for domestic postage and is admired for its elegant design. Like the 6 kreuzer stamps, it featured a numeral design that reflected the simplicity and practicality of Bavarian postal issues at the time. However, due to its limited print run and the passage of time, few of these stamps remain in good condition today, making it a highly prized item in philatelic circles.

### Coat of Arms on Bavarian Stamps
The stamps from this era also often featured Bavaria’s distinctive coat of arms, symbolizing the state's independence before it became part of the North German Confederation in 1871. The shield, typically adorned with lions and a lozenge pattern, was a powerful representation of Bavarian identity. Stamps bearing this heraldic symbol are particularly significant as they reflect the state’s national pride and its standing in pre-unification Germany.

Together, these stamps from 1867-1868—particularly the rare 6 kreuzer blue, brown, and 3 kreuzer lilac—are treasured not only for their beauty but also for their historical significance, representing an important chapter in German and European postal history.