letter scale

Pitney-Bowes letter scale

This looks like a somemewhat odd flat-iron, but it is a real letter scale. At the long arm of this unequal-arm scale, division stripes are given per half an ounce. The range is 16 ounces. V-shaped grooves are set at the upper side of the long arm at each half ounce. A strip with a V-shaped end is attached to the slidable weight. This V-edge fits into the grooves at the long arm. In this way, a quick repeat at 32 weighing positions is possible. To adjust the zero leveling, a little screw driver is needed. In balance, the black horizontal mark at the free end of the long arm has to be in line with the red line at the housing. The scale rests at three rubber feet. A steel cover finishes the bottom of the housing.

side-view

very substantial

robust

three rubber feet

The weighing plate is composed of two parts. The chromed top plate is clenched at the second plate at four spots. This clenching is made by folding extrusions of the top plate. At the underside of the weighing plate the number 4900- is punched. This is followed by the number 40266. The last is engraved electrical. At the inside of the aluminum frame the number 4904000 and a small logo are in the casting. Maybe it's the logo of the foundry. Also, there is a blue control stamp. Even the inside of this frame is thoroughly sprayed in the same color. The name Pitney-Bowes and the logo are rather awkward set at the scale by means of stickers. The postal rate is on the turnable cylinder. In case of rate change, Pitney-Bowes wants $1 for a new chart. Presumably, these charts were self-adhesive. The domestic first class mail rate starts at 5 cents per ounce. was valid from 1963 till 1968. Below some more photos of this flat-iron-like letter scale.

plate outstretched of the frame	postal rate at roll	awkward name sticker
aluminum slidable weight	edged rate-pointer	scale in equilibrium