Found at the Mesa Thrift along with an Aceliner for $1.99 each! :D
Really, one of the more attractive modern-ish Swingline designs, it was superceded in 1970 by the bread-n-butter Model 747.
opens up easily with a bottom-mounted lever for tacking.
Standard Swingline-style top loading. Easy to load and takes standard staples.
makes both Interfold and Exterfold staples.
The Model 27 Swingline Stapler was introduced in 1952 and “Improved” in 1954. I recall seeing these quite often at school growing up – not as omnipresent as the crinkle-grey boxy 1940’s Bostitches that permeated my childhood institutional memories, but still often enough that I remember them. The School Green and Teal color combo may have been a special run for school systems, but I can’t tell for sure.