Poul Henningsen, Taklampa, "PH-5", Louis Poulsen, Danmark.

197 matches of a different object type (e.g. accessories like cushions for the item) were excluded. Each sale is normalised to a neutral single item — hammer price divided by empirically measured quantity and condition factors (a pair ≈ 1.41× a single, damaged ≈ 0.82×) — the same recipe as the Tupendan valuation engine. Trend is a Theil–Sen fit over monthly medians; under ±5%/yr we call it stable.