Variable Clock
<UL>
<LI><b>M401B</b> is a drawing of DEC's M401B.</LI>
<LI><b>M401C</b> needs a drawing.
<LI><b>M401H</b> is a drawing of DEC's M401H.</LI>
<LI><b>M401L</b> needs a drawing.
<LI><b>M401M</b> is a drawing of DEC's M401M.</LI>
<LI><b>M401X</b> is a 'modernized' M401.</LI></UL>
M401Hback.jpg