I spent this evening drawing up copies of the depictions of wings on crests from 1410 to the 1480s. A quick tally of the images I have collected, which is in no way a full collection of every crest illustrated from this time, shows the following trends.
* Single wings were only shown after 1460 and they all run front to back, displaying the wide view from the side of the helm.
* 8 pairs of wings were shown running front to back 1410-1450s
* 2 pairs of wings were shown running front to back 1460s - 1480s
* 4 pairs of wings were shown running left to right 1410-1450s
* 3 pairs of wings were shown running left to right 1460s - 1480s
In both types of positioning, L-R and F-B, both were shown on birds and just as wings rising from a helm.
