silkywhisky
Bunnahabhain / Islay

BUNNAHABHAIN 20 Years Old 2004 1st Fill Oloroso Sherry Butt Foundations Signatory Vintage

0.61× hidden gem 20yo rating 5.0/5 · n=2
cheapest
€329.00
whisky.fr
intrinsic
€538.42
N
1

Is it worth the price?

BUNNAHABHAIN 20 Years Old 2004 1st Fill Oloroso Sherry Butt Foundations Signatory Vintage is an Islay single malt Scotch from the Bunnahabhain distillery, bottled at 20 years old. Tasters score it 5.0 out of 5 across 2 reviews. A single retailer lists it at €329.00, against a model fair price of around €538.42. That is 0.61× the model estimate — well below what its age, strength and house predict, and one of the clearer value picks in the data. The estimate is fitted on age, bottling strength and the distillery's other prices; community ratings add no measurable signal to it, so this is not a quality judgement. Typical error is around ±65%, so read the verdict as indicative and trust it most at the extremes. It is one of 13 Bunnahabhain bottlings priced here; the others are compared below.

Retailers tracked

Retailer Price
whisky.fr €329.00

How we got this number

The valuation model predicts a price from this bottling's inputs. The multiple is the actual market price divided by that prediction.

Inputs
Rating
5.00 / 5
Age
20yo
Region
Islay
Distillery tier
Mid Label only — set from the distillery’s median price, not used by the model.
Result
Predicted price
€538.42
Actual price (median)
€329.00
Multiple
0.61×
Verdict band
hidden gem (≤ 0.80×)

See the regression's coefficients →

Methodology estimate

The deterministic model from methodology.md: production cost per litre × bottle size, plus maturation cost per year, plus a cask premium, times an ABV factor — then multiplied by a quality grade summed across six 0–3 axes.

Cost floor
Production (€0.14/cl × 70 cl)
€9.80
Maturation (20 × €1.20/year)
€49.95
Cask premium (first fill sherry)
+€12.00
× ABV factor
×1.53
Cost floor
€109.42
Quality grade (six 0–3 axes)
  • Process distinctness
    lightly peated for Islay; long fermentation
    1 / 3
  • Cask provenance
    first fill sherry
    2 / 3
  • Bottling integrity
    61.0% ABV; non-chill-filtered inferred from ABV; E150a caramel colouring not disclosed
    3 / 3
  • Ownership
    Distell (Heineken) — production-led corporate
    1 / 3
  • Heritage
    founded 1881 (145 years of operation)
    2 / 3
  • Reputation
    5.0/5 across 2 reviews
    1 / 3
Quality score
10 / 18
Quality multiplier
×1.83
Intrinsic and multiple
Intrinsic value
€200.61
Actual price (median)
€329.00
Multiple
1.64×
Verdict band
mild premium

Maturation context

Islay · rolling 12 months: 1,593 mm at Lingerton (46 km). Scotland W rolling 12-month rainfall2,451 mm, +33.70% vs 1995-2024 median.

Other bottlings from Bunnahabhain