This Page Last Updated September 5th, 2009 (new style reckoning)
The Great Horologion of 1552
Chasoslov - Chasovnik - Slavonic Horologion
This was finished before the errors of Nikon in 1652. The Old Believers, like no other kind of Christians, actually practice the correct daily hours of worship. The book which contains these many prayers is not small. This can be viewed in PDF format from this
link. The Old Believers really do not have a Prayer Book but rather use something more complete, as this is.
The photos above are from a Shorter Horologion known as the Chasovnik,
I believe this book was printed in 1649.
The link at the top in the top paragraph is Longer Horologion, the Chasoslov.