>  1) Weber Duo-Art, Ser. No. 77442, and
>  2) Wilcox & White Angelus-Artrio, Ser. No. 37475.

If the Weber was made in the USA, my Pierce Piano Atlas, 10th edition,
shows 1921 as the year.

As for the Wilcox, this large a serial number is not listed:  the last
date is 1919, for serial number 13800.  You probably won't find a model
number on pianos this old, but look everywhere on the piano -- there
might be one.

Scott Olson
Missoula MT