| Lawrence |
| Description | Price | Date | Bids |
Prices of slide rules sold on ebay (the internet auction) in Aug-2007 |
| Vintage Lawrence Engineering Wooden Slide Rule | $16.00 | 06-Aug-2007 | 5 |
| VINTAGE LAWRENCE ENGINEERING WABASH WOOD SLIDE | $9.99 | 05-Aug-2007 | 1 |
| "Lawrence Wooden Slide Rule, Made USA -Peru, I | $7.99 | 04-Aug-2007 | 1 |
| "old advertising slide rule LAWRENCE ENGINEERI | $7.00 | 19-Aug-2007 | 1 |
| Lawrence Peru IN No. 10-8 Slide Rule with Shea | $3.50 | 12-Aug-2007 | 1 |
| Lawrence Engineering Service Slide Rule Mod. 1 | $3.00 | 13-Aug-2007 | 2 |
| Lawrence Engineering Service Wabash Ind Wood S | $0.99 | 22-Aug-2007 | 2 |
| LAWRENCE Engineering Wooden SLIDE RULE Peru IN | $0.99 | 24-Aug-2007 | 1 |
| "Lawrence Engineering Slide Rule, 6 scales, Mo | $10.00 | 05-Aug-2007 | 0 |
| Lawrence Wood Slide Rule & United Aircraft Cal | $9.99 | 15-Aug-2007 | 0 |
| 3 Vintage Slide Rules PRECISION *LAWRENCE *HEM | $9.99 | 17-Aug-2007 | 0 |
| "Lawrence Wooden Slide Rule, Made USA -Peru, I | $9.99 | 20-Aug-2007 | 0 |
| 1942 Lawrence Engineering Slide Rule w/ HOW TO | $9.99 | 29-Aug-2007 | 0 |
| LAWRENCE SLIDE RULE WITH BOX PERU INDIANA | $8.00 | 22-Aug-2007 | 0 |
| "VINTAGE WOOD WOODEN LAWRENCE 10"" SLIDE RULE | $7.95 | 27-Aug-2007 | 0 |
| VINTAGE LAWRENCE SLIDE RULE INSTRUCTION MANUAL | $6.00 | 26-Aug-2007 | 0 |
| 1939 Lawrence Slide Rule Instruction Book | $5.99 | 09-Aug-2007 | 0 |
| "Vintage Lawrence Slide Rule - 10-B, Wooden w/ | $5.00 | 22-Aug-2007 | 0 |
| "Vintage Lawrence Slide Rule - 10-B, Wooden w/ | $5.00 | 29-Aug-2007 | 0 |
| Lawrence Engineering Wood Slide Rule In Case | $5.00 | 07-Aug-2007 | 0 |
| VINTAGE LAWRENCE 10 INCH SLIDE RULE EXCELLENT | $5.00 | 19-Aug-2007 | 0 |
| Vintage Lawrence Slide Rule Instruction Book | $3.99 | 27-Aug-2007 | 0 |
| VINTAGE LAWRENCE ENGINEERING WABASH WOOD SLIDE | $3.99 | 22-Aug-2007 | 0 |
| Vintage~LAWRENCE SLIDE RULE RULER~Engineer~Mat | $3.99 | 26-Aug-2007 | 0 |
| Vintage Wooden Slide Rule by Lawrence | $3.50 | 20-Aug-2007 | 0 |
| 8-B & 10-B Slide Rule Lawrence Engineering Vin | $3.50 | 17-Aug-2007 | 0 |
| "Lawrence Engineering Slide Rule, 6 scales, Mo | $0.99 | 12-Aug-2007 | 0 |
| ©1940 Lawrence Slide Rule Instruction Book | $0.99 | 03-Aug-2007 | 0 |
| LAWRENCE ENGINEERING SERVICE VINTAGE SLIDE RUL | $0.99 | 15-Aug-2007 | 0 |