The main device (symbol) in the Knoff blazon is the eagle. The two main tinctures (colors) are or and gules.
The bright yellow colour frequently found in coats of arms is known to heralds as Or, or sometimes simply as Gold.1. Along with, argent, or silver it forms the two “metals” of heraldry – one of the guidelines of heraldic design is that silver objects should not be placed upon gold fields and vice versa 2. The yellow colour is often associated with the Sun, and the zodiacal sign of Leo.3.
Red in heraldry is given the name Gules, sometimes said to be the “martyr’s colour”4. The colour is also associated with Mars, the red planet, and the zodiacal sign Aries 5. Later heralds of a more poetical nature would sometimes refer to the colour as ruby, after the precious stone.6.
Where the lion is undisputed king of the animals, the eagle undoubtedly plays the same role in the realm of the birds, its use in this form dating back to at least the Roman period 7. They tend to be illustrated in quite some detail, especially in continental European arms, and have almost as wide variety of postures and accessories as the lion, well illustrated in the reference 8 as well as being just the eagle’s head or eagle’s leg. The symbology of the eagle is deep and complex, Wade devotes several pages to the subject 9, but suffice it say that it has long been associated with Empire and those held in high honour – any armiger would be pleased to have any form of Eagle upon their arms!