The stamps from the Kingdom of Bavaria, particularly from the period of 1908 to 1915, are among the most intriguing and valuable in philately. These stamps not only represent a crucial part of German postal history but also reflect the era's meticulous craftsmanship and symbolism. Among the rarest and most sought-after are the Bavarian Coat of Arms stamps, specifically the Bayern 10 Rose, Bayern 50 Dark Brown, and Bayern 5 Green. Each of these stamps bears a distinctive “E” marking, which adds to their historical and collectible appeal.

The Bayern 10 Rose is a particularly distinguished stamp, both for its vivid pink hue and its intricate depiction of the Bavarian coat of arms, a design embodying the state’s heraldic tradition. Issued in a rose color, it represents the elegance and pride of the Bavarian state and is now valued for its rarity, especially with the uppercase "E" marking, which is a signifier of its limited distribution. This "E" marking, believed to be a control or inspection mark, was used on select stamps to indicate specific print runs or quality assurance measures, adding an element of exclusivity. This rarity, combined with the rose coloration, makes the Bayern 10 Rose highly prized among collectors.

The Bayern 50 Dark Brown, another key stamp from this era, features a darker and more somber color palette, aligning with the refined Bavarian aesthetic. The dark brown color complements the regal tones of Bavaria’s emblem, and this stamp is notable for its limited production and special "E" marking as well. This stamp's shade and precision in design further exemplify the German dedication to quality, and it’s precisely this rarity that makes it a highly coveted item in philatelic collections worldwide.

Lastly, the Bayern 5 Green stamp also stands out due to its unique shade of green and detailed heraldic imagery. The green color was less common than others, and when coupled with the "E" marking, it denotes a particular run that was possibly intended for official or select use. The green tone of this stamp, in combination with its limited availability, makes it especially valuable.

These Bavarian stamps from the early 20th century have continued to grow in value over the years, with each bearing the "E" marking that amplifies its appeal. Together, they tell a story of Bavaria’s unique identity before it became part of unified Germany, and they remain precious artifacts of both German history and philatelic artistry. Collectors who own these stamps are holding a piece of history that represents a period of elegance, attention to detail, and Bavarian pride.