That's an alloy of 3 oz. of tin to 160 oz. of lead, roughly 53 to 1 (Pb to Sn), or about 1.8% tin (good to go by me!).
The other alloy of 16 Pb to 1 Sn is as Markopolo ciphered...
Under State mandated STAY HOME, the pewter "dry out" is not unusual as folks are just not coming out to see their shadows yet.