The HelveticaULC engraving font is the old world version of the Helvetica font family.
The HelveticaULC uses the same letter shapes for the upper and lower case letters. The difference is that the lower case letters are 2/3rds the height of the upper case letters. Because the lower case letters are the same shape as the upper case there are no descenders to affect the engraving.
This font engraves well as all upper case or as mixed case.