OR120 Overdrive

Overdrive (master-volume) version of the OR120.

Catalogue code: OR120 Overdrive
Years: 1970
Type: head
Valves & speakers: as the OR120 head but with an additional presence knob (six knobs in total)
Lifecycle: unknown
Confidence: Medium

Specifications

Watts
Speakers
Tubes
Channels

How this model is dated

01 / Witnesses

What applies here

Marks that can be entered for this maker: Serial number (plate), Transformer code, Born-on / QA sticker.

02 / Bounds

The model year is a floor

Nothing predates 1970; components only push the date later.

03 / Value

What moves the price

Sold-price aggregates are not collected yet, so the archive gives no figure — condition, originality of the transformers and a documented recap move this model more than any list price.

Evidence: Blue Book of Guitar Values — orange