Royal Selangor Pewter Pine Tankard Mug

-Vintage Pewter Tankard from Royal Selangor -Size: H12.5cm x 13.5cm x Dia 8.5cm -Weighs approx 1.2lbs A wood handle and a body shaped and textured to resemble pine bark give this contemporary tankard an unexpectedly rustic flavour. In a bright pewter finish. Condition: Good overall no chips. There are two deep scratches on the inside as pictured. There are a few scattered dark dots/light wear scratches (not exactly sure if it is just wear discoloration) on the tankard. I have tried to take pictures of these. I don't know anything about cleaning/polishing pewter so I have not attempted to clean these.