It's neither a Barzam nor a Macross Valkyrie (lol), it's a Barzam-style.

The Barzam is an AEUG/Karaba specification of the Barzam, and apparently there's a setting that it's an MS that was modified from surplus Barzams. Its model numbers are MSA-008 and RGM-87. It appears in the comic "Double Fake Under the Gundam," etc.

I created the Gundam Mk-III Goofer by mixing the Hyaku Shiki and Mk-II. Then I mixed the surplus Mk-II parts from that with a Barzam to create a Barzam Kai-style. Furthermore, I mixed the surplus Barzam parts from that with yet another kit.

Virjim style | GPO144's Gunpla works