Mechanical     MICROMETERS       Analog   &   Digital 

TECHNICAL DATA  of the  Mechanical ANALOG MICROMETER  ( lower left )
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Range 0 - 25 mm                                        Model 394-BMG
Unit of 0.01 mm                                         SN = 3133976
                                                                    
CARL ZEISS, Jena / Germany                                    (1960)



TECHNICAL DATA of the Mechanical DIGITAL MICROMETER  ( upper right )
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Range 0 - 25 mm                             Model 193-111 / M820-25V
Unit of 0.01 mm                                         SN = 3133976

MITUTOYO Mfg.Co.Ltd., Tokyo / Japan                           (1970)



TECHNICAL DATA of the Mechanical ANALOG MICROMETER   ( USA Version )
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Range 0 - 1.0 INCH                                        Model 1641
Unit of 0.001 INCH

LUFKIN RULE CO., Saginaw, Michigan                            (1950)

R E M A R K S :
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There are  3 FRACTION-TO-DECIMAL  CONVERSION TABLES  on the caliper:
Front side, left  =  8ths  &  16ths  ;   32nds  =  Front side, right 
Back  side, left  =  64ths ( 1 ... 29 )   &  ( 31 ... 63 )  =  right

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© C.HAMANN     http://public.beuth-hochschule.de/~hamann    01/30/07