If you check the casing, you will find that the Deltrol brand is clearly marked.
Wilmar Paralleling Relay Model 181DDBX
you can tell it's a Potter just by the color and labeling, which is really convenient.
A nice touch is the Savant Racepoint RPE brand appearing on relays that fit everyday projects stands out about the Savant Racepoint RPE brand is how smoothly it blends into relay choices.