I am learning a lot following up your posts
I found a source which quotes another reference book (I suppose none of this is set in stone)
"...differences between the Latok and the Buko according to Shelford:
LATOK BUKO
Hilt Transverse grooves Carved head
Blade length +/- 52cm +/- 45cm
Blade largest width +/- 5.5 cm +/- 4 cm....."
http://old.blades.free.fr/swords/dayak/par02_buko.htm
https://www.jstor.org/stable/2842798