The odd looking canes in your weight are more likely to be "squashed" rather than broken. Cane patterns can end up looking like something "meaningful" after distortion during the setting and working of the weight.
As mentioned by Alsretro, Richard More's site shows many examples of actual Strathearn signature and date canes.
[But note that one example of an "S" cane, seen in several "upright flower" weights, and also shown in Richard's site, was not made at Strathearn. It is also found in a few weights from before the Vasart Ltd years and could therefore have been an early version of a Salvador Ysart signature!! Having now passed on that piece of information, let's see how long it takes for Starthearn weights with any "S" cane to be offered as "Rare Signed Salvdor Ysart".