GOLD PATEK PHILIPPE CALATRAVA REF. 2457 “GOBBI MILANO", SOLD IN 1955 Three body circular 18K gold case, n. 305559, flat bezel, concave lugs, snap on back. Not original strap and buckle.
Silvered dial signed, retailed by “Gobbi Milano”, applied bâton indexes, minute and 1/5th of second divisions on one rail. Gold bâton hands and centered seconds. 
Signed manual winding movement, rhodium-plated caliber 27-SC, n. 703628, indirect seconds, fausses-côtes decoration, lever escapement, cut compensated bimetallic balance with screws, blued Breguet hairspring, Parechoc shock-absorber, micrometer regulator. 
Accompanied by Patek Phillippe’s extract from the archives.
Diameter Ø: 31 mm
Note: working.