As Tom illustrated, the shape of the pennons differed from era to era, but all appeared to be swallow-tailed. These uncertainties makes it difficult to render them accurately. It was impossible to tell if the triangle was red or yellow. By 1815 they were red over white over blue. Disbanded in 1871.
Poor illustration suggests that the yellow stripe was half the height of the other colors.
Would appreciate any info that you can add. Incidently, I don't know the significance of the frequent mention of 1890 . Recently some lance pennons were posted to the list. I comment only on a few. Wuttemberg changed in 1871 the order from black over red to red over black.