Plate III · Specimen Valuation
Conchae Archives
Quality outlives the buyer
Return multiples upon original acquisition cost — auction records, 1780–2024
Acquisition Return Multiple
10×
20×
30×
0.8×
1.2×
2.4×
5.8×
14×
38×
10 yr
25 yr
50 yr
100 yr
150 yr
200 yr
Years since original acquisition
TAB. III
This is the
Conchology Shell Plate
design system, applied by
Curio Design
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