Welcome to the Strelets Forum. Please feel free to discuss any aspect of 1/72 scale plastic figures, not simply Strelets. If you have any questions about our products then we will answer them here.
Good observation Thomas. Presumably it is one of the honorific flags. As Rawkins puts it:
"During the period 1806 to 1814 silk cravats were introduced for presentation to the regiments for special honours. These were of individual patterns for each regiment which was honoured in this manner and varied in colour, often being red or crimson, yellow or yellow and black with gold trim and tassels."
Rawkins wj (2016) The Austro-Hungarian Army 1792-1814
http://www.thehistorybookman.webeden.co.uk/home/4579739019