Market Benchmark & Secondary Valuation
Estimated Price Range
$1,200 - $16,500
USD Secondary Market
5-Year Retention Rate
300.0%
Historical Resiliency
Liquidity Index
Mystic Stamp / Siegel Rare Exchange
Global Demand Score
The Z-Grill embossing was designed to prevent re-use of stamps. Only 2 copies exist, making Scott #85A a multi-million-dollar holy grail.
Diagnostic & Authentication Features
- ✓ Z-Grill Embossed Pyramid Grid Dimensions (11x14mm) Audit
- ✓ 1-Cent Franklin Steel Engraved Blue Ink Spectrum Scan
- ✓ Philatelic Foundation (PF) Certificate Verification
5-Year Valuation Trajectory Forecast (2026 - 2030)
| Year | Standard Valuation | Bullish Trajectory | Bearish Floor |
|---|---|---|---|
| 2026 | $1,200 USD | $17,820 USD | $1,080 USD |
| 2027 | $1,248 USD | $18,480 USD | $1,092 USD |
| 2028 | $1,296 USD | $19,140 USD | $1,104 USD |
| 2029 | $1,344 USD | $19,800 USD | $1,116 USD |
| 2030 | $1,392 USD | $20,460 USD | $1,128 USD |
Frequently Asked Questions
What determines the current secondary price for STAMPS Benjamin Franklin 1c Z-Grill?
Secondary pricing is determined by condition grade, originality of movement/hardware, serial number provenance, original box and warranty documentation, and recent international auction hammer prices.
How can I verify authentic markings and provenance?
VODICY's neural engine analyzes macro photos of hallmarks, laser engravings, movement serials, and leather grain structures against a database of over 500,000 verified luxury specimens.