I got this in a box of reloading stuff I recently bought. The operating instructions state to put that small metering chamber into the bottom of the measure, pull the handle foward and then push back. Pull down on tube and then pour it into the funnel on a case. Do these pour accurate charges? Has the old school cool factor to it. I am either going to mount it to the bench, throw it in a box in the attic or sell it. How old is this thing, any idea?