I checked the Extraordinary Form.
There is no mention of a pall (by that name, or any other).
Here’s an online version of the EF funeral texts:
sanctamissa.org/en/resources/books-1962/rituale-romanum/43-burial-of-adults.html
Yes, I did check the printed books (2 versions of Weller) and all the sources agree…there’s no mention of a pall of any color, or by any name.
Now, as we all know, when the E.F. was the only form, a black pall was used at funerals, at least in the Americas.
The absence of any mention of a casket pall in the EF burial rite indicates that it was not universally required. It might have been universally used (for all I know), but not required.
I will also point-out that in the E.F. the rubrics were clear that a deceased cleric was to be buried in violet vestments (we know there were exceptions, e.g. Cardinals were buried in red) because violet is the color of penance. However the casket pall was still black, the color of mourning. The point of mentioning that is
we should not ascribe too much importance to the color of the pall in the EF. If it were truly important, the Church would have either required or used violet palls for clerics. Maybe cathedrals had violet palls? I don’t know, but I do know that I’ve never heard of them.
Side note: At the funeral of (now Saint) Pope John XXIII his body was vested in red and the funeral pall was likewise red. Here is a photo
thinkingfaith.org/sites/default/files/20140424_1b.jpg
So while the casket pall in the Ordinary Form (approved in the 1970s by Bl. Paul VI) **is symbolic of baptism, it seems to me that there is no one explanation for the pall in the Extraordinary Form. **
My liturgical instincts tell me that there was no
substantive significance to the color of the pall until Bl Paul VI revised the rite in the 1970s and associated it with the white garment of baptism. Yes, the casket pall was (and is, EF) black, but I suspect that was more coincidence because all the other cloths were black, than it was an intention to cover the deceased in black for some specific reason.
I also looked-up the etymology of the word “pall.” Despite its similarity with the word “pale” (as in white) there’s no connection. A pall may be any color. Note also that a “chalice pall” is to be the same color of the vestments. I mention this because some people have told me that a pall is white by definition—that’s not the case.