The 100W "plexi" Super Lead — the model number that became the archetype of the Marshall stack.
Marks that can be entered for this maker: Serial number (plate), Transformer code, Speaker code, Born-on / QA sticker, Panel features (no code).
Nothing predates 1966; components only push the date later.
Sold-listing reading: fair $3,003, good $3,238, excellent $16,287 USD · 8 sold listings · as of 2026-10-14. clones/reissues filtered out (none appeared in this window); excluded lots are other models (JMP 2204/2104/2103, Park-brand 1229). IMPORTANT for display: condition label does NOT track price for this model - the driver is the year (1967-69 plexi-era > late metal-panel), so 'good' lands above 'very good' in this sample. Reverb exposes the price and condition but not the exact sale date, so asof = measurement date; no Fair/Poor sale observed; fair = lowest sold price in sample
Evidence: Blue Book of Guitar Values — marshall · reverb.com