| Lawrence |
| Description | Price | Date | Bids |
Prices of slide rules sold on ebay (the internet auction) in Jul-2007 |
| 1939 LAWRENCE slide rule ruler & Instruction B | $15.50 | 06-Jul-2007 | 3 |
| "1946 10"" Lawrence Printers Proportion Slide | $14.99 | 25-Jul-2007 | 1 |
| Vintage Lawrence Model 10B Slide Rule & Box | $9.99 | 05-Jul-2007 | 1 |
| Vintage Lawrence 10 In Slide Rule 250 BT w Cas | $9.99 | 23-Jul-2007 | 2 |
| 1939 LAWRENCE SLIDE RULE INSTRUCTION BOOK | $8.89 | 01-Jul-2007 | 6 |
| Vintage Lawrence Wood Slide Rule/Case/Book | $6.51 | 04-Jul-2007 | 3 |
| *Lawrence Secret Code-Maker Slide Rule Premium | $5.99 | 31-Jul-2007 | 1 |
| ©1940 Lawrence Slide Rule Instruction Book | $5.00 | 27-Jul-2007 | 1 |
| "4 Vintage Slide Rule Lot,Mannheim,Lawrence,Di | $4.99 | 31-Jul-2007 | 1 |
| Antique Lawrence DeLuxe Slide Rule + Box | $4.00 | 19-Jul-2007 | 1 |
| "Lawrence Engineering Service Slide Rule, PERU | $3.99 | 13-Jul-2007 | 1 |
| Ca. 1935 Lawrence Wabash Indiana Slide Rule No | $3.50 | 22-Jul-2007 | 1 |
| Vintage 1946 Slide Flash Rule Lawrence Enginee | $2.99 | 22-Jul-2007 | 1 |
| VINTAGE LAWRENCE ENGINEERING SERVICE SLIDE RUL | $1.00 | 18-Jul-2007 | 1 |
| LAWRENCE SLIDE RULE- MADE IN PERU INDIANA | $0.99 | 31-Jul-2007 | 1 |
| Original Lawrence Slide Rule | $0.99 | 29-Jul-2007 | 1 |
| Lawrence Deluxe Slide Rule | $0.99 | 13-Jul-2007 | 1 |
| LAWRENCE DELUXE SLIDE RULE | $14.97 | 25-Jul-2007 | 0 |
| LAWRENCE SLIDE RULE- MADE IN PERU INDIANA | $9.99 | 17-Jul-2007 | 0 |
| Vint Original Engineering LAWRENCE DeLuxe Slid | $9.99 | 22-Jul-2007 | 0 |
| VINTAGE LAWRENCE ENGINEERING SERVICE SLIDE RUL | $9.99 | 10-Jul-2007 | 0 |
| LAWRENCE SLIDE RULE WITH BOX PERU INDIANA | $8.00 | 18-Jul-2007 | 0 |
| Vintage Lawrence 10 inch Slide Rule | $7.99 | 04-Jul-2007 | 0 |
| VINTAGE LAWRENCE ENGINEERING SERVICE WOODEN SL | $4.99 | 03-Jul-2007 | 0 |
| "Lawrence Engineering Service Slide Rule, PERU | $4.99 | 01-Jul-2007 | 0 |
| "1939 ""Lawrence"" Slide Rule Instruction Book | $3.99 | 21-Jul-2007 | 0 |
| "1939 ""Lawrence"" Slide Rule Instruction Book | $3.99 | 14-Jul-2007 | 0 |
| "Vintage Wooden Slide Rule,Lawrence Engineerin | $3.95 | 26-Jul-2007 | 0 |
| "VINTAGE Lawrence Engineering WOOD SLIDE RULE | $0.99 | 05-Jul-2007 | 0 |