The 903-A Random Signal Generator is a pretty simple module.
Moog did not give modules serial numbers until 1967 and started at serial 1001 so this is the 6th 903-A produced after assigning serial numbers.
This PCB has the edge fingers. Many of the Moog modules have a separate PCB with the edge fingers.
White noise on top and pink noise on the bottom. This is a triggered view so you can see the gap on the left at the trigger point.
An expanded view of the noise without the trigger discontinuity.