Disclaimer: I am clueless and taking pictures of pens is much harder than you guys make it look.

I recently bought this Sheaffer vacuum filler at an antique store. To show how little I know, I thought that it was a Craftsman when I bought it. Looking at reference material, it looks to be a Balance, but there is no white dot, the size and colors are wrong and all of the blances that I see referenced are lever fillers.

The length is 4 5/8" and the girth is 13/32".

The barrel is stamped only with the normal
W.A. SHEAFFER PEN CO.
FORT MADISON, IOWA, U.S.A.
MADE IN U.S.A.

The color appears to be caramine striated and portions of the center of the barrel do show light passing through.

The clip reads SHEAFFER'S with the script S at the beginning and the script S as an extension of the R at the end.
The clip looks like the '34/'35 flattened ball on the balance.
There is a thru hole drilled in the cap perpindicular to the clip.

The nib has a heart shaped breather hole and reads
SHEAFFER'S
3
MADE IN U.S.A.

So, if it not a Balance, what is it? I indend to use this a daily writer so the value itself is not particularly important, but I do want to know what to call it when people ask.

I have not started claning this one up yet, but here are some pictures.
Sheaffer Red Composite.jpgSheaffer Red Nib + Cap.jpg