1999 Pennsylvania State Quarter: Value, Errors, and Collecting Guide

1999 Pennsylvania State Quarter Design Overview

The obverse of the coin features a portrait of the first US president, George Washington. Surrounding him are the inscriptions United States of America, Quarter Dollar, Liberty, and In God We Trust, as well as the mint mark S, P, or D. However, all other coins in this series have such an obverse, even the 1999 New Jersey State Quarter.

1999-D quarter Pennsylvania Regular Strike

The reverse depicts the Statue of Commonwealth against the backdrop of the outlines of this state. Around it are inscriptions. A keystone is also located there. It symbolizes the nickname "Keystone State."

Pennsylvania State Quarter Value Guide

Mint Mark

Philadelphia	349,000,000
Denver	358,332,000
San Francisco (proof)	3,713,359
San Francisco (silver)	804,565

Mint Mark is not only an indicator of where the coin was minted, but it also indirectly indicates the mintage quantity of such specimens.

“A proof coin is the highest quality of coin a mint produces. These coins are attributed a much higher value than the metal itself due to their status as a commemorative coin.”
– unnamed page about proof coins
BullionByPost website

This is important for understanding value, as mintage directly affects the coin's price. And here, it is not even a question of whether the mintage is low, then the coins will be more valuable. Absolutely not. It can vary.

As in the case of the 1999 Connecticut State Quarter. If the mintage of a regular strike is large, it is consequently difficult to find valuable specimens within it, and this increases their value.

Grade Population

Grade	P Regular	D Regular	S Proof	S Silver
66	991	821	13	18
67	476	143	32	87
68	22	1	201	419
69	-	-	7008	11485
70	-	-	936	1165

According to PCGS Grade Population reports, the rarest State Quarter Pennsylvania turns out to be from Denver, despite its mintage being the largest. The most frequently encountered is the silver version from San Francisco.

1999-S quarter Pennsylvania Silver, DCAM (Proof)

This is because it was created not for regular strikes, but specifically for collectors. That is why it has been preserved in higher grades.

And although the MS-70 is the ideal coin condition that collectors hunt for, it still doesn't mean that the price of such a specimen will be higher than others.

Metal Content

Regular Strike	75% Copper, 25% Nickel
Silver version	90% Silver, 10% Copper

As we can see, the regular strike consists of copper and nickel. These are not very expensive metals; they are not highly valued in the market.

However, the silver version contains 90% silver, and this is more valuable. As a rule, silver coins usually cost more than their face value, and therefore they are minted primarily for collectors.

1999-P quarter Pennsylvania Regular Strike

1999 Pennsylvania State Quarter Value for Collectors

Grade	S Regular	D Regular	S Proof	S Silver
60	$3	$3	$5	-
62	$3	$3	$5	-
63	$4	$4	$6	$7
64	$5	$5	$7	$7
65	$5 - $9	$5 - $9	$8	$7
66	$12 - $16	$12 - $24	$8	$8
67	$35 - $150	$125 - $725	$8	$8
68	$1,350	$8,750	$8	$8
69	-	-	$10	$20
70	-	-	$30	$75

Thus, we would recommend purchasing a specimen from the Denver Mint, as it is the rarest, specifically in MS-68 grade.

But we would also recommend the proof or silver versions from the San Francisco Mint in MS-70 quality, as this is considered benchmark quality and a pride to have such a specimen in one's collection.

If you don't know how best to find it, you can use the Coin ID Scanner app. This is a professional tool for numismatists, and it perfectly identifies even the rarest errors.

However, there are even rarer specimens, such as the Pennsylvania State Quarters Errors. If you find such a specimen with a Double Die or Off-Strike Center, you will surely gain significant value.

Therefore, if you want to find a more valuable specimen than a regular strike or special collector version, we recommend you use the app.

Professional numismatist and data expert applying predictive analytics to coin markets. Developed AI models for Coin ID Scanner, boosting reliability in coin identification and global collector engagement.