Modded Arp 2600

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"This particular 2600 has a rather unusual modification, as shown on the panel it is called phase locking. I have gotten more information about this ....
THIS IS AN ARP MODIFICATION, VERY RARE !!! THE MATCHING STENCILED LABEL YOU SEE ON THE FRONT PANEL uses matching font, color etc
. I have gone inside and done diagnosing and have determined that the power supply is good, I also just recapped it, and it's in great order now. .....all of the major modules are functioning and only a couple of slide pots need replacement. I So that is the condition I am listing it in. The filter module has been removed from the circuit board and I have successfully unpotted and repaired it, to full working order, .....sounds great !"