Fortress Katalog Monet i Banknotów Polskich - Polish Coins and Banknotes Catalogue

Rarity Level

Rarity Level:

Position on the scale to represent volume of minted coins or evaluated volume of existing coins.
Allows to quickly recognize its volume and make a quick decision on which coins are better, and which are not.
Rarity Level is displayed by pictures (drawings) in the search return page and in the coin details page.
RR - 1 piece
R8 - 3 to 2 pcs
R7 - 6 to 4 pcs
R6 - 25 to 7 pcs
R5 - 120 to 26 pcs
R4 - 600 to 121 pcs
R3 - 3,000 to 601 pcs
R2 - 15,000 to 3,001 pcs
R1 - 80,000 to 15,001 pcs
R - 400,000 to 80,001 pcs
- - over 400,001 pcs

Tips:

Choose coins with higher R.
Rarity Level for modern coins has been divided to 10 subpoints to better display difference in mintage.

Catalogue Prices

Catalogue Prices?

Prices could be displayed in 16 world currencies. Currency can be selected from Preferences
(top-right of the page). Values are automatically calculated in daily exchange rates.

Tips:

Pay great attantion to Fortress Algorithm. No matter what is market's condition, it evenly represents coin's value.

Fortress Algorithm

Fortress Algorithm?

Fortress Algorithm is mathematically calculated coin price considering: year, denomination, type of metal, weight, mintage and grade. All coins are subject to the same mathematical formula, so the outcome price evenly represents value for every Polish coin.

Tips:

Fortress Algorithm is very helpful in assigning a price to a coin that did not appear on any auction.
Compare this price with catalogue or market price to identify coins with potential in gaining its value.

Grade

Grade?

Coin's state of condition.
( PF ) ( StL ) - Proof (frosted design with absolute mirror-like field).
( UNC ) ( I ) - No visible signs of wear. Bag marks may be present.
( AU ) ( I/II ) - A little trace of wear on highest points of the coin.
( XF ) ( II ) - About 95% of the original detail visible.
( VF ) ( III ) - About 75% of the original detail visible.
( F ) ( IV ) - About 50% of the original detail visible.
( VG ) ( V ) - About 25% of original detail visible.
( G ) ( VI ) - Substantial wear. Only design outlines visible.

Internationally, Grades are displayed on scale from 0 to 70:
MS 61 to MS 70 - State I ( above uncirculated )
MS 60 - State I ( UNC - uncirculated )
AU 50 - State I/II ( AU - about uncirculated )
XF 40 - State II ( XF - extra fine )
VF 20 - State III ( VF - very fine )
F 12 - State IV ( F - fine )
VG 8 - State V ( VG - very good )
G 4 - State VI ( G - good )

Tips:

Grade influences the price of circulating coins the most.
Remember! Collect coins with highest grades.

Latest Sales on Auctions

Latest Sales on Auctions?

Presented table describes grades and realized prices of coins appeared on auctions.

Listed prices does not include buyer's premium, which usually is 10 to 20 procent.

Tips:

Look for auction description in brown colour. You may press it, to see actual pictures of the coin, that appeared on that auction.

Republic of Poland from 1990 (before denomination)

Cat.: 1990PL01920

Year: 1990

100000 Zlotych

1990PL01920 / 1990 / 100000 Zlotych

pictures: Antykwariat Numizmatyczny - Michal Niemczyk

1 close - Solidarity 1980-1990 - proof

Diameter (mm): 39.0

Weight (g): 31.10

Comp.: Ag 999

Latest Sales on Auctions

2019-12-15

AN23_1838

PF ( StL )

320 PLN - 84 USD - 76 EUR

Sale Date	Auction	Grade	Price
2019-12-15	AN 23_1838 2019-12-15 / AN 23_1838 / PF ( StL ) / 320 PLN - 84 USD - 76 EUR Pictures: courtesy of Antykwariat Numizmatyczny Michal Niemczyk	PF ( StL )	320 PLN - 84 USD - 76 EUR

**Original catalogue currency is PLN

Catalogue prices are based on the reference exchange rates provided by the European Central Bank on 2026-10-13

( 1 PLN = 0.25562054469018 USD) ( 1 USD = 3.9120486235252 PLN)

Republic of Poland from 1990 (before denomination)

100000 Zlotych

1 close - Solidarity 1980-1990 - proof

nbp an an wcn cc spot