The first ver­sion of L’Omnium was designed for paper stere­oviews in var­i­ous for­mats. L’Om­ni­um III was intend­ed for glass stere­oviews in the for­mats 45 x 107 and 6 x 13 and is equipped with a ground glass to dif­fuse trans­mit­ted light. The num­ber­ing implies the exis­tence of an Omni­um II; how­ev­er, no such mod­el is doc­u­ment­ed. The des­ig­na­tion may refer to a vari­ant fit­ted with rec­tan­gu­lar prism lens­es instead of the stan­dard round lenses.
Some L’Omnium stere­o­scopes are housed in cas­es bear­ing the name Julian Damoy. It is often assumed that he was the man­u­fac­tur­er. In fact, Julian Damoy was a Parisian gro­cer who rebrand­ed and dis­trib­uted L’Omnium. L’Omnium was a com­mer­cial­ly suc­cess­ful view­er, and sev­er­al rebrand­ed ver­sions exist.