TECHNICAL  DATA  of  the  Electro-Mechanical  Printing-Calculator
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Model = DBN 8385A                             Montgomery-WARD 7/8

Serial Number:       E37C30580

Dimensions:   (ca.)  Width   =   8_1/4" /  21 cm
                     Depth   =  11_1/2" /  29 cm
                     Height  =   4_3/4" /  12 cm

Weight:       (ca.)  8 lbs  /  3.7 kg

Power Supply:        115 V AC, grounded

Mechanics:           Serial-to-parallel Conversion,
                     10-Block-Keyboard
                     
                     Black Nylon Ribbon (= Typewriter):
                     1/2" * 20'  /  13 mm * 6 m
                     Paper Roll (Standard):
                     2_1/4" * 2_3/4" * 165'  (W * D * L)
                     57 mm  * 65 mm  * 50 m  (B * D * L)

Functions:           Add, Subtract,
                     NonAdd, Repeat, Subtotal, Total

Registers:           Input       =  7 Decimals
                     Arithmetic  =  8 Decimals
                     Printing    =  9 Characters
Distributed by:
                     Montgomery-WARD / USA
                     as Model DBN 8385A

Manufacturer:        EIKO Business Machine Co. Ltd.
                     as Model UNITREX
                     Made in Japan
                     1960

CHANGING THE RIBBON:
********************

(A) Remove the Cover:
    -----------------
    (1) Open and remove orange paper roll cover.
    (2) To remove orange back:
        o  Lift the upper part until the
           plastic clamp is free.
        o  Move it backward.
        o  Push it down to unfasten the lower
           plastic clamps from bottom.
        o  Push back and remove.
    (3) To remove yellow cover:
        o  Lift the back.
        o  Shift it backwards to unfasten the
           front plastic clamps from bottom.
        o  Lift cover and remove.
        o  Observe how the ribbon is spooled.
(B) Change the Ribbon.
    ==================
(C) To put back the Cover:
    ----------------------
    Perform the steps in reverse order.

PRINTOUT - Example                  with Comments:
**************************************************

^^^^^^^^^^^^^^^^
|        .00 T |   Press (T=Total) to clear memory
|              |
|              |                  < Max.Input = 7 decimals >
|  76,543.21   |   Enter (1st)number, Press (+)
|  98,765.43   |   Enter (2nd)number, Press (+)
| 175,308.64 S |   Press (S=Subtotal) to print sum
|       1.23 - |   Enter (neg.)number, Press (-)
| 175,307.41 S |   Press (S) to print cumulated sum
|       4.56   |   Press (X=Repeat), Enter number, Press (+)
|       4.56   |   Press (+), Press (C=ClearKeyboard)
| 175,316.53 T |   Press (T) to print total sum
|              |                 < Max.Output = 8 decimals >
|              |
|        .00 T |   Press (T), Memory is clear
|              |
|        .13 N |   Enter item #13, Press (N=NonAdd)
|      12.34   |   Enter price
|        .47 N |   Enter item #47, Press (N)
|      56.78   |   Enter price
|        .11 N |   Enter item #11, Press (N)
|      91.01   |   Enter price
|     160.13 T |   Press (T) to print total sum to pay
|              |
|        .00 T |   Press (T), Memory is clear
|              |
|      12.00   |   Enter number
|      24.00 - |   Enter (larger negative) number
| 999,988.00 T |   Negative sum = COMPLEMENT!
|              |
^^^^^^^^^^^^^^^^
                   Have a look at "Calculating Trickies" ...

PS.:  This  »KULMBACH« MUG with its  BAVARIAN FLAG  is a souvenir 

impressum:
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© C.HAMANN      http://public.BHT-Berlin.de/hamann       01/27/06