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| official count | PSS type | footnote(s) | price | authorization | Comment: Hoover-Noble Universal style numbers; PSS Town and Type catalog, 6th edition, is current basic reference |
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| 601 | deleted | T1-SU47ext TX study footnote:Roby listed "T-1" similar to 601 | |||
| [ ] | 818 | 15 | Aug 1963 | ||
| handstamp | unlisted | TX study footnote:block caps 4mm high reading "ALTO, TEX." used diagonally |
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