Gallery Weighing scales Weighing scale on Sunday 11th March 2018 Sunday 11th March 2018 Spring scales calculate weight that is the product of mass into gravity (9.807 m/s2) on the force on a spring Antique firefighter's helmet. USSR. Early 20th century. ... Antique hand-painted porcelain plate, early 20th century Made on Kuznecov porcelain factory in Riga, Russian Empire.... Leave a comment Leave a reply Please login or register to review