Mk III red or green???

[Markooo99]

I’m just noticing my Mk III has a green squiggle and red “R” near the power cord hole.
Thought it was a green stripe from sellers info but now am curious.
Serial # is 28041.
Thanks.

 

[user 41014]

Red stripes ended around 22000.
No question green stripe if it is DRG (simul-class, reverb, eq).
28000 is a late green.

 

[Markooo99]

Thanks. Yes simul-class.

 

[GJgo]

That's to indicate the "reverb mod". It's an update in the MKIII design to help the reverb suck less.

 

[user 41014]

design to help the reverb suck less

lol

Did they come from the factory that way with the R? I would think by 28000 they had the reverb figured out. I think it is beefing up the wattage handing of a resistor(s) but idr if it's more than that. It's jangling around in my head and I could be wrong but I think it was the load resistor for the reverb driver, maybe 1W to 2W?

 

[GJgo]

Honestly I'm not sure. The thing to do would be to try & find photos of green stripes without it.