1938-39 Zippo for  Lockheed in metallique.  See more Lockheed Zippos.

1940-41 Zippo with the image of a nut for "Elastic Stop Nuts".  The reverse reads "Light Weight Consistent with Sound Engineering".

This is a 1941 Zippo with an engraved emblem with an English royal lion and colors which reads "Dieu et Mon Droit", French for "God and my right". The motto was adopted as the royal motto of England by King Richard I in 1198. 

Unusual 1938-39 Zippo with an engine-turned chromed brass case with the initials "MAP".

1940-41 Zippo for J.K Smit Sons  with image of a blacksmith swinging a hammer at an anvil which reads in Latin "Super Materiam Ignis Triumphans - Est. 1888" or "Fire Triumphs Over Material".

1940-41 brass case Zippo with a prototype desig

1938-39 Zippo with the initials "WFM" in metallique.

1938-39 Zippo with a line-drawn logo for the Texas Employers' Insurance Assn. in Dallas on the front and for the Employers Casualty Company on the reverse.

Reverse engraved 1938-39 Zippo advertising Northeastern Container Corp.

1938-39 Zippo advertising "Hygeia"  in metallique. Hygeia was a Greek goddess of good health.

1940-41 Zippo for Warren & Bradshaw Drilling Co. Tulsa.  The reverse has the initials "CAD".

1937 reverse engraved Zippo advertising The Glidden Company - "Time Tested".

In 1937 Zippo introduced a new design featuring a chromed brass case with a rounded top and bottom, replacing the square models which were discontinued in 1940.  This allowed the lid and bottom to be formed as wholes, eliminating the need for the soldering the case together.  They were available with and without the decorative diagonal corner lines. World War II and the resulting shortages of  brass and chrome led to the steel case Zippo introduced in 1942.  See World War II Zippos.

1937 to 1942 Zippos

Reverse engraved 1938-39 Zippo advertising "Otto Cream Top" milk bottle for the Otto Milk Company of Pittsburgh Pennsylvania.