Here at Brooklyn Museum Library we’ve been adding MARC fields for Brooklyn Museum collection objects for many years (since 1986 or 1987).
We use MARC 699 in this format:
699 04 Brooklyn Museum object ǂn object accession number ǂt Title (Artist)
e.g.,
699 04 Brooklyn Museum object ǂn 41.1087 ǂt Fresh Air (Homer, Winslow)
Our custom left-anchored "Brooklyn object" OPAC search targets the accession number and title subfields.
Here are some representative records:
Serious play: design in midcentury America
https://arcade.nyarc.org:443/record=b1447841~S2
French moderns
https://arcade.nyarc.org:443/record=b1402153~S2
More than a likeness
https://arcade.nyarc.org:443/record=b1280168~S2
Art and appetite
https://arcade.nyarc.org:443/record=b1273032~S2
Beth Kushner
Librarian
Brooklyn Museum
200 Eastern Parkway, Brooklyn, NY 11238-6052
P 718-501-6309