New voere imperial model 2165. Cosmoline or something, really grimey. Wanting to disassemble and clean. It has safety level on right side of trigger assembly. Has a pin with half inch disk holding lever to trigger housing, the ? On opposite side the pivot pin protrudes .there is a small disk, a washer l guess and it appears the end of the pin that goes through the trigger housing is peened like a rivet . Is this correct? The only picture I could find of this particular trigger is on a Santa Barbara mauser. Thank you for any information about this.