| Lawrence |
| Description | Price | Date | Bids |
Prices of slide rules sold on ebay (the internet auction) in Apr-2007 |
| Vintage Lawrence Music Transposer Slide Rule | $46.00 | 20-Apr-2007 | 4 |
| Vintage Lawrence Music Transposer Slide Rule | $17.45 | 21-Apr-2007 | 7 |
| Lawrence Engineering Slide Rule with how to us | $12.50 | 29-Apr-2007 | 2 |
| VINTAGE SLIDE RULE RULER LAWRENCE DELUXE ENGIN | $10.50 | 29-Apr-2007 | 2 |
| Lawrence Model 10B Slide Rule and Box | $9.99 | 06-Apr-2007 | 1 |
| Vintage LAWRENCE ENGINEERING 8 in Wood #8-B SL | $8.00 | 02-Apr-2007 | 3 |
| 1946 Lawrence Cutting Speed Calculator Slide R | $6.99 | 15-Apr-2007 | 1 |
| Vintage Wood Slide Rule Lawrence Engineering I | $6.26 | 09-Apr-2007 | 4 |
| Vintage Slide Rule Lawrence Engineering Svc Wa | $5.00 | 22-Apr-2007 | 1 |
| Vintage Lawrence Engineering Wooden Slide Rule | $5.00 | 27-Apr-2007 | 1 |
| Lawrence DeLuxe 10-B Wood Slide Rule with Case | $5.00 | 27-Apr-2007 | 1 |
| VINTAGE WOOD SLIDE RULE LAWRENCE ENGINEERING 8 | $3.99 | 06-Apr-2007 | 1 |
| The lawrence Slide Ruler | $3.50 | 10-Apr-2007 | 1 |
| VINTAGE SLIDE RULE LAWRENCE ENGINEERING WABASH | $0.99 | 15-Apr-2007 | 1 |
| LAWRENCE DELUXE SLIDE RULE | $14.97 | 02-Apr-2007 | 0 |
| Slide Rule & Instruction Booklet Lawrence Engi | $8.00 | 03-Apr-2007 | 0 |
| VINTAGE LAWRENCE ENGINEERING SLIDE RULE 8-B PA | $5.99 | 19-Apr-2007 | 0 |
| Vintage Lawrence Engineering Wooden Slide Rule | $4.99 | 21-Apr-2007 | 0 |
| VINTAGE SLIDE RULE / LAWRENCE ENGINEERING/ SLI | $3.99 | 30-Apr-2007 | 0 |
| LAWRENCE WOOD SLIDE RULE 10-B w CASE and EXTRA | $3.50 | 21-Apr-2007 | 0 |
| Lawrence Slide Rule - Original Box | $3.25 | 04-Apr-2007 | 0 |
| Vintage 1939 Lawrence Slide Rule Instruction B | $2.99 | 29-Apr-2007 | 0 |
| Vintage 1939 Lawrence Slide Rule Instruction B | $1.99 | 22-Apr-2007 | 0 |
| Lawrence Engineering No. 10-B Slide Rule | $0.99 | 02-Apr-2007 | 0 |
| Lawrence Engineering No. 10-B Slide Rule | $0.99 | 10-Apr-2007 | 0 |
| "LAWRENCE ENGINEERING SERVICE,{SLIDE RULE}" | $0.99 | 02-Apr-2007 | 0 |