Very old Tissot watch

hi everyone, i need some help. i have an old Tissot watch from my grandpa but there isnt any information on It. no numbers, no model. i cant find anything similari on ggle images. Is a simple watch tho, nothing fancy, but id like to know a bit more of it.
It Is all steel i guess, elastic, it has a translucid double Xx Mark on every piece of the band. It has data and 12,9,6 numbers. nothing on the back, nothing around the watch.
Thank you all.
Leonardo