British North Borneo: Labuk Planting Company Limited, 20 cents, copper, brilliant proof, undated, weight 4.10g, the reverse inverted,NGC Census and Coin Archive InformationNGC: None in MS, (PFBN: 6; PFRB: 3)PCGS: None in Population ReportCoin Archives: At least 5 (2 of them proofs)(LaWe-693h, Pr-50, SS-30) NGC Proof Details (Laquered), NGC Cert. #5984215-009. SC 578 Barrett, no Purch. #。