The best match I can find are the coats of arms used by members of the families of the Bassets and Laigns, the difference of the crests in the colours used.
The description of this crest is "three piles issuant from chief" A "pile" is the triangular shape "from chief" means from top. (from the illustrated atlas of Heraldic terms http://www.heraldica.org/topics/glossary/atlas.htm )
Several sites on heraldry suggested that it was common for exterior ornaments to be added to a crest when developing family coats of arms, such as the mantling and helmet on yours.
More info and a pic from the link below. Without finding an exact match, I am not convinced this is conclusive, but hope that it is a step in the right direction for you Dave.
>>> Here on the left are the arms of Rauf Basset, Or three piles Gules, as they appear on the arms of an undated Roll in the reign of Henry III (1216-1272), suggesting that the development of the differences may have been ~ from the chief dancetty to the palewise piles to the piles meeting in point. (The mediaeval Bassets were a large and moderately influential family, and a study of their different arms will well reward students of heraldry.) Arms of Basset Another example of an indented line or charge influencing or being influenced by piles may be found in the arms of Laing. This is an interesting Scottish family whose origins are subject to debate. The three shields below are from left to right ~ Laing (from Pont's MS of 1624) - Argent three piles conjoined in base Sable; Laing of Morisland (also from Pont's MS) - per pale Argent and Sable, a chief indented and counterchanged of the same; and Laing of that Ilk ((from the Workman MS of 1565-66) - Argent three piles Sable. Arms of Laing Arms of Laing of Morisland Arms of Anstruther In his comments on the arms of James Laing of Morisland (above centre), Alexander Nisbet (1722) states explicitly that the indentation was in place of piles. The arms above right are as once used in the second and third quarters by Laing of that Ilk (with the arms of Erskine (Argent a pale Sable) first and fourth. This was potentially confusing, because Argent three piles Sable are the arms of Anstruther of that Ilk. Were the Laings at that time indicating an ancient connection not only with the Erskines but also with the Anstruthers? That the tinctures of the three families are the same would reinforce any family tradition of a common beginning, possibly during the reign of David I, when William de Candela was made Lord of Anstruther and took its name. As Beryl Platts has indicated, piles are common charges in Flanders, where silver and black were the colours of Alost (Aalst in Flemish).
Piles are sometimes blazoned as passion-nails, the nails of the crucifixion, and where this term is used they are usually painted with a relatively narrow width.<<<
