| Year | 1920 |
| Date | 23-Sep |
| Volume | 43 |
| Issue | 1,013 |
| Page | 244 |
| Category | Trade |
| Part | |
| Title | The Scientific Works of Messrs. E.R.Watts and Son, Ltd. |
| Author | |
| Notes | Machine & fitting shop, engraving & dividing shop, enamelling parts of instruments by air pressure spray, dumpy pattern level, cabinet shop, Transt (transit?) theodolite, laths of levelling staff, prismatic compass, circular dividing engine |