Nothing like picking up a 'dead horse' to see if there is a more lively response.

From the Fall 2024 L C Smith Journal that is provided about 13 entries concerning Monogram Grade history before this entry on this site:

With help from the readership, would like to concentrate on:
1-Proof of the two dog version termination in 1904, and
2-The year of introduction of the four bird version

FORUM REQUESTS

Provide a picture of a:
1 - Serial numbered Monogram double higher (later) than 202639 exhibiting the two dog version of engraving. Houchins reports on p. 532 that the highest number shipped in 1904 in the First Series Number list as 202639.

2 - Serial numbered Monogram double lower (earlier) than 104695 exhibiting the four bird version of engraving. This article points to 1928 but earlier ones may exist.