Perfs as they appear on 1991 Holcombe certificate
RAS Sale 1133, 7/26/2017, lot 237 - $5,500 hammer
1991 Holcombe Certificate No. 5668/91 "the stamp has various defects ie. a thinning and a hole where the grill is breaking through the stamp and perforations clipped at right but it is not repaired in any way."