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Compiled from these manuals:
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| AG-440/445 | Issued Jan 1967 |
| AG-440B/445B | Issued Feb 1969, changed Aug 1971 |
| AG-440C | Issued Apr 1975, changed Mar 1981 |
| AG-440C-8 | Issued June 1974 |
| MM-1000 | Issued Sept 1969 |
| MM-1100 | Issued Jan 1974 |
| MM-1200 | Issued Oct 1977, changed Jan 1981 |
Record/reproduce card revision numbers
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Revision
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| Model | Variety | Bias | Record | Reproduce |
| AG-440 | All | -01 | -01 | -01 |
| AG-440B | 1/4″ | -05 | -01 | -03 |
| 1/2″ | -05 | -01 | -05 | |
| Maybe 1” * | -04 | -01 | -07 | |
| ** | -03 | -03 | ||
| AG-440C | 1/4″ | -09*** | -03 | -12 |
| 1/2″ | -08 | -03 | -12 | |
| 1” | -05 | -03 | -12 | |
| MM-1000 | All | -04, -05 | -01 | -04 |
| MM-1100 | All | -05 | -01 | -14****, -15 |
| MM-1200 | 7.5-15ips | -08 | -04 | -12 |
| 15/30ips | -08 | -04 | -15 | |
* Manual lists an electronics assembly comprising these cards, but doesn’t associate it to a variety
** Manual mentions these revisions without associating them to a variety or electronics assembly
*** This is per the manual, but -08 cards are more commonly found
**** Found in an early example of this machine, but not documented
Record EQ plug-in PWA, common to all machines where applicable
| Revision | Speed pair | Standard | Comments |
| -01 | 7.5/15ips | NAB/NAB | |
| -02 | 3.75/7.5ips | NAB/NAB | |
| -03 | 7.5/15ips | CCIR/CCIR |
CCIR is now known as IEC
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| -04 | 3.75/7.5ips | CCIR/CCIR | |
| -05 | ? | ? |
May not exist – no references in the manuals
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| -06 | 15/30ips | CCIR/AES | |
| -07 | 15/30ips | NAB/AES | |
| -08 | 15/30ips | NAB/AES |
For MM-1200, but appears identical to -07
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Reproduce EQ plug-in PWA, common to all machines whereapplicable
| Revision | Speed range | Standard | Comments |
| -01 | 3.75-15ips | NAB or CCIR |
Accommodates either
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| -02 | 7.5-30ips | NAB or CCIR |
Accommodates either
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| -03 | ? | ? |
Found in an early MM-1100 but not documented.
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