Early Non-Dated Coin: 1 Denar From Bohemia

Hi I'd like to share the story of one of my coins with you. It isn't dated, but we can still bracket the minting timeframe to a 24 year span.

King Vratislaus II became duke of Bohemia in 1061 when his older bother died. He was an ally to Henry IV, the Holy Roman Emperor and went to fight in Italy for the emperor in 1081. This alliance proved to be beneficial to Vratislaus' career and raised Bohemia's standing in Europe. In 1085 or so, he was crowned the first king of Bohemia. He died less than ten years later in a hunting accident.

See below for a picture of my denar from Bohemia. The diameter is 17 mm and the mass is 0.7 g. It was minted in Prague while Vratislaus II was duke (1061-1085 AD) as opposed to his later years as king (1085-1092 AD). Other than a small flan crack at six o'clock on the obv, this coin is in extraordinary condition.
The obv inscription is WENCEZLVS, but follows a counter-clockwise path around the periphery. Similarly, the rev inscription is WRATIZLVS but again following a path contrary to most other coins. The rev main design element is a hand holding a lance. The attribution is Frynas #B.10.8 and Smerda #164. While no examples of this specific coin are listed on vcoins presently, there are several coins of Bohemia from the timeframe of 1000 to 1100 AD. Interestingly, many of them are in comparable condition to mine. Obviously, these never saw much circulation. Maybe these coins are representatives of tributes sent to the Pope on regular occasions and therefore sat in some papal vault for many centuries? I wonder if anyone on CCF can shed additional light as to why these coins are so well preserved seemingly in large numbers.