Does anyone know what this is and what it's worth?

From: Bridgett
Email: bgladney@hemc.net

Comments

I have recently aquired a calculator (I think)that is supposed to be a 1920's model R.C. Allen. From other pictures I've seen it appears to be a manual calculator with a pull-type lever on the side. It is made by R.C. Allen figuring machines (Allen Calculators, Inc.) model# 805. I've searched for info on it and can't come up with anything R.C Allen!! Please help!