"C" Code 1880 WSM.......

[pbe gummi bear]

That's a nice, 18.5" WSM.  If I recall correctly, not all the vents are stamped on my 1880. It's possible that the person assembling it just picked up non-stamped vents.

[mike.stavlund]

My E-code 14 is no beauty, and @harris92 has witnessed that.  It was missing the water pan, had the straps all rusted out, has mysterious holes drilled in the door, and is really banged up.  But it's a great cooker!  Mine has a modern 14 water pan now, which might be deeper than the old one-- in any case, mine runs much like my 18WSM, except with a whole lot less charcoal.  I usually use smaller fires that I tend more frequently, though.

Fire it up, harris!  It should work well... though yours is so clean that it might need a few cooks to build up some gunk to get a good seal on all of the joints.