Sol #2
      
Model 20
s/n 402718
video connector: weird (not coax, not RCA)
      
16K RAM PT  (c)1977  
   factory assembled/tested 3/30/78
   SW1: 1,5,8 ON;
   SW2: 1,3,5,7,8 ON
             
16K RAM  "16K STANDARD"   24-103A
   Seattle Computer Products (c) 1978
   Serial 9094
   S1: 5,6,7,8 ON
   S2: all off
   
Formatter   Rev C PC301004  Assy. No. 301003
   (c) PT 1977
   [s/n] 100445 (hand written)                           
   
Helios II Controller  PC 101001  Assy. No. 301000
   (c) PT 1977
   [s/n] 100614 (hand written)

Personality Module PN 2708
   (c) PT 1977
   Assy 107000
   chip: SOLOS-1 AM921680C 31076 7725PE
   PC 107001 Rev B