SoMik, Буквы перед цифрами могут быть какие угодно (в зависимости от производителя) -NE, SE, SA, JRC и т.д. И после 4558 тоже могут быть разные. Даже L для корпуса SIP
Вот один товарищ не поленился исследовать весь генезис скримера
:
1. 111179 (R) jRC4558D 1980, from SRV/Cesar Diaz, nut on power jack
2. 111642 (R) JRC4558D 1980 nut on power jack
3. 112198 (R) JRC4558D 1980, nut on power jack 2SK121 FETS
4. 112862 (R) RC4558P Malaysia 1980/31st week, nut on power jack
5. 116118 (R) RC4558P Malaysia, nut on power jack
6. 120229 (R)
7. 120274 (R) RC4558P 1980/35th week, power jack nut
8. 120407 (R)
9. 122858 (R)
10. 126469 (R) RC4558P
11. 126648 (R)
12. 127460 (R) JRC4558D 1980 chip
13. 131544 (R) RC4558P Malaysia 1980/40th week, no power jack nut
14. 131542 (?) no power jack nut, 2SK44
15. 131630 (R) RC4558P malaysia chip 1980/35th week, 2SK44
16. 131661 (R)
17. 139290 (R) no nut on power jack, JRC4558D 0727 chip made in 1980
18. 139329 (R)
19. 139659 no nut on jack, Texas inst Malaysia chip
20. 139767 TI RC4558P
21. 144650 TL4558P 1981?
22. 144990 no (R)
23. 146264 (R) is OD-855 in TS808 shell
24. 151870 (R) (orig#?) 1981 JRC4558D
25. 152048 (R)
26. 153125 no (R)
27. 154114 no (R) JRC4558D
28. 157788 no (R)
29. 158135 (R)'81 JRC4558D
30. 162972 JRC4558D killer tone
31. 163311 no (R) JRC4558D, 1981 chip
32. 164337 no (R) JRC4558D, no power jack nut, 1981 chip and caps
33. 170002 no (R) '81 JRC4558D chip, no power jack nut
34. 175729 no (R) JRC4558D chip, no power jack nut
35. 177390 no (R) '81 JRC4558D, no power jack nut
36. 178490 no (R)
37. 181298 no (R) or nut, 1981 JRC4558D 1444 2SK44 FETS
38. 149111 - late 1981 TS9, with JRC2043DD chip.
39. 197833 - Early TS9 from 1981.