Hi Eddie, sorry I havent got a definitive answer for you, but judging by the condition of mine (1960 Aceca Bristol) I am sure they had been veneered and laqured, whether the laquer was there fom new or had been done at a later date I couldn't say.
I had to make a couple of replacements so I went for the option of re veneering and laquering and I'm so pleased with the result, they're not even in the car yet and in my eyes they are beautiful! So for me I would probably make the same choice again even if armed with other info....
Not sure if this helps at all but I'm finding out that they're all slightly different, so my thinking now is that I should do the resarch to try to get the right info and where there is no definitive answer I just do what makes me the happiest keeping in mind what was available in period.
All best wishes Nick