Noah_D
Bronze Member
- Dec 14, 2017
- 1,593
- 3,491
- 🏆 Honorable Mentions:
- 1
- Detector(s) used
- Nokta Makro Simplex+, Garrett ACE 300, Carrot
- Primary Interest:
- Metal Detecting
Your button is not made of Pewter. It is what is called a Colonial era "Spun-back" 1-piece button made of a brass ally called White Tombac. It differs from "regular" Tombac by having 1% of the metal Arsenic added into the usual Tombac's 85% copper + 15% zinc recipe. The addition of the Arsenic turns the Tombac's usual orange-golden color into a silvery color. Your button's date ranges from the 2nd half of the 1700s into the early 1800s.
Sidenote which may be of interest (and educational) to some people:
During World War 2, Canada manufactured some 5-cent coins made of "regular" Tombac. You can see its golden color in the photo below. That color was brighter when the coin was in uncirculated condition. The other photo shows a Romanian coin made of White Tombac, showing that metal's silvery color.