The two main devices (symbols) in the Lewalt blazon are the arm in armour and ring. The main tincture (color) is gules.
Red in heraldry is given the name Gules, sometimes said to be the “martyr’s colour”1The Symbolisms of Heraldry, W. Cecil Wade, George Redway, London, 1898 P36. The colour is also associated with Mars, the red planet, and the zodiacal sign Aries 2Understanding Signs & Symbols – Heraldry, S. Oliver & G. Croton, Quantum, London, 2013, P53. Later heralds of a more poetical nature would sometimes refer to the colour as ruby, after the precious stone.3A Complete Guide to Heraldry, A.C. Fox-Davies, Bonanza (re-print of 1909 Edition), New York, 1978, P77.
The Arm appears frequently in the crest of a coat of arms, often armoured and described in some detail as to its appearance and attitude. 4A Glossary of Terms used in British Heraldry, J.H. Parker, Oxford, 1894, Entry:arm It can also appear on the shield itself as a charge. The arm itself is said to signify a “laboorious and industrious person” 5The Symbolisms of Heraldry, W. Cecil Wade, George Redway, London, 1898 P92, whilst the arm in armour may denote “one fitted for performance of high enterprise” 6A Display of Heraldry, J. Guillim, Blome, London, 1679, P184
The most common form of household jewelery in heraldry is the ring or gem ring, shown with a jewel which may have a different colour. 7A Glossary of Terms used in British Heraldry, J.H. Parker, Oxford, 1894, Entry:ring Wade, incorrectly terms the annulet a finger ring, but assigns the meaning of “fidelity” to it – more properly this meaning belongs to the gem ring. 8The Symbolisms of Heraldry, W. Cecil Wade, George Redway, London, 1898 P94