When the “Veritas Model” was being designed, it was decided that the dials would measure slightly smaller in diameter than the standard 18-Size dials the Elgin National Watch Company fitted on other movements.
One of the immediate benefits is that the smaller dial could fit closer to the pillar plate, allowing for a slightly thinner movement.
Interestingly, in the 1927 Material Catalog lists the Veritas Model dials as “18s ¾,” implying that the dials are larger than a standard 18-Size dial. However, the dials applied to the earlier 18-Size models measure approximately 45.0-45.8mm while the “Veritas Model” dials measure approximately 44.7-44.9mm.
To accommodate the screws securing the barrel bridge, the dial foot locations are slightly different than other 18-Size models. This adaptation also prevents dials from easily being interchanged between the other models.