Mechanical     MICROMETERS       Analog   &   Digital 

TECH-DATA  of the  Mechanical  A N A L O G  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)



TECH-DATA of the Mechanical DIGITAL/ANALOG MICROMETER  ( upper right )
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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

                Have a look at a "HYBRID" MICROMETER ...
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© C.HAMANN         http://public.BHT-Berlin.de/hamann         03/05/07