[antir-heralds] cc - Fieldless, a rustre argent

[Judy Harcus]

"Fieldless, a rustre argent" appears to be clear but it seems too good 
to be true.

Although it is combined with mascles in the Ordinary, there is a 
precedent (Francois la Flamme) which indicates they do not conflict:
"A question was raised in commentary about heraldic difference between a 
rustre and a lozenge. A rustre is an uncommon charge in comparison with 
lozenges and mascles, but one which is described in late period. 
Hierosme de Bara's 1581 Le Blason Des Armoiries pp. 46-47 depicts the 
lozenge, the rustre, and the mascle. These are treated as distinct 
charges in the treatise. Thus, these three charges are considered 
significantly different under the provisions of difference in RfS X.4.e, 
which states, "Types of charges considered to be separate in period... 
will be considered different." "

I found rustres in gules, azure, sable and some divided but no plain argent.

Have I missed anything?

Alicia