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IBM Model M 1386303 terminal
The first version of the IBM Model M keyboard was for use with terminals
The 1386303 can be identified by the square silver logo on the right hand side, the non-removable cable and the extra key on the numpad. Most other versions of the model M keyboard have a dark Minus key spanning two rows on the numpad. Since this keyboard does not feature a PS/2 connector a converter is needed for use with a PC.
My 1386303 has a very early production date, a low serial number an like every Model M produced in the US up to May of 1986 a barcode on the label.
This 1386303 is probably one of the oldest model M keyboards in the world.
/*pz*/char p[]=" ELPRTWZ";unsigned z[]={553179788,1641},
_=14;main(){while(_--)putchar(p[z[_/012]>>3*(_%10)&7]);}
(K) All Rites Reversed