United States of America

Seiler Instrument & Manufacturing Co Inc
3433 Tree Court Industrial Blvd.
St. Louis, MO 63122

Seiler Instrument & Manufacturing Co Inc


Seiler Instrument is a contract manufacturing company specializing in high precision machining and optical instrument assembly. Seiler is the Original Equipment Manufacturer for the optical fire control used on all United States howitzer and mortar systems. This includes the manufacture of telescopes, periscopes, telescope mounts, periscope mounts, aiming circles, fire control quadrants, and more.



Seiler machines, assembles, and tests products for the United States Government, military contractors, and companies in the private sector. In addition, Seiler is a distributor of surveying software and instruments, microscopes, and Zeiss Planetarium equipment. The Seiler foundation is made up of several main divisions including Manufacturing, Geospatial, Microscopes, and Planetarium. Seiler’s corporate headquarters is located in St. Louis, Missouri, with additional Geospatial sales offices in Indianapolis, Kansas City, Milwaukee, Omaha, and Chicago.

Manufacturer of Armaments
Trade Intermediary