Jose:

I've viewed them and they beautiful tubes with interesting marks. I would of guessed circa 1840 as per other examples of the period so I'd say 1844 is correct. There looks to be the old Suhl mark of an ax and sole mark along with a "BL" or "RL"(tube maker or barrel drawer) and a couple of large "P"s. It looks like you can feel the tube pattern from the acid dip; can you?

Kind Regards,

Raimey
rse