Looking through my Chubb stuff recently and found 2 nice Chubb cabinet locks with close serial numbers. One is 797153 and the other 797156. They both have the Chubb fish logo (with smiling mouth!), but Also a distinctive Orb and Cross mark.

Ive searched on here and found this has been discussed before, but it seemed not even Peter Gunn knew what the Orb & Cross mark was for. So, just wondering if anyone ever found out anymore to throw some light on these unusual Stamps- reminds me of those used typically as Hallmarks, but both locks are sadly brass and not 18k gold!
Click image for larger version.  Name: image.jpeg  Views: 20  Size: 530.8 KB  ID: 14528