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Stamp Collectors Against Dodgy Sellers
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| Commonly "Manufactured" Flat Plate Issues of the United States | |||
| This stamp can be manufactured | by reperforating this stamp, | by trimming the top and bottom, or sides of this stamp, | or by trimming stamps from this booklet pane |
| 316 | 314 | 300 | 300b |
| 317 | 315 | 304 | |
| 318 | 314 | 300 | |
| 321 | 320 | 319 | 319g |
| 322 | 320a, 320b | 319f | |
| 348 | 343 | 331 | 331a |
| 349 | 344 | 332 | 332a |
| 350 | 346 | 334 | |
| 351 | 347 | 335 | |
| 352 | 343 | 331 | |
| 353 | 344 | 332 | |
| 354 | 346 | 334 | |
| 355 | 347 | 335 | |
| 356 | 338 | ||
| 385 | 383 | 374 | 374a |
| 386 | 384 | 375 | 375a |
| 387 | 383 | 374 | |
| 388 | 384 | 375 | |
| 389 | 376 | ||
| 390 | 383 | ||
| 391 | 384 | ||
| 392 | 383 | ||
| 393 | 384 | ||
| 410 | 408 | ||
| 411 | 409 | ||
| 412 | 408 | ||
| 413 | 409 | ||
| 441 | 408 | 424 | 424d |
| 442 | 409 | 425 | 425e |
| 443 | 408 | 424 | |
| 444 | 409 | 425 | |
| 445 | 426 | ||
| 446 | 427 | ||
| 447 | 428 | ||
| 461 | 409 | ||
| 519 | 344 | ||
| From How to Detect Damaged, Altered, and Repaired Stamps, Paul W. Schmidt, 1996 | |||