| Description | English: Helical upholstery spring, from a 1922 advertisement for James Steele, Limited, Guelph, Ontario |
| Date | 1922 |
| Source | Advertisement in Furniture and Furnishings (https://archive.org/details/furniturefurnishings1922/page/n93/mode/2up) |
| Author | Anonymous |
This scalable illustration can be used at any size without loss of resolution.