i initially passed on this item due to the english 'made in' marking, but it grew on me, the hilt & guard especially looked better made than most tourista junk (that looped lower guard was familiar somehow, but i can't place it), so i risked a small bid, about an hours pay & won it... i'll either consign it to the OOPS drawer or not depending on the blade dimensions and detailing when it arrives. i'll also bill my client an extra hour for working on an email they sent me yesterday
a number of interesting example illustrations i found googling for mexican weapons:
Billed as found near a well known east texas battle that occurred in 1836...

this style may be earlier than prev. mentioned. for scale, this has a 27 in. blade, an inch longer than mine. the perspective of the photo makes it look longer than it appears.
from the forum:
from therion for illustration:
i note that this was described as a 'duck-billed' blade style.