21. The Assay Office was then founded and hallmarked its first piece on 20 September 1773. 22. Seattle didn't have an assay office when the ton of gold arrived in 1897. 23. One impediment to Boulton's work was the lack of an assay office in Birmingham. 24. The book contains details of each assay office in the country, with their various marks. 25. Although most of his proposals were defeated, an assay office was established at San Francisco. 26. The assay office was purchased at a sheriff's sale by James Bailey in 1907. 27. A smaller rock alignment nearby was part of an assay office from the late 19th century. 28. They were made at the San Francisco Assay Office but bore no " S " mintmark .) 29. One of the 2 Dutch assay offices is located in Gouda between the Amsterdam and Rotterdam Airports. 30. James A . Baker III presided over the striking ceremony held at the San Francisco Assay Office .
