24.5 mm diameter, 13.5 g, 92.5% silver, flat edge denomination "10 LEI", year 2004	inside an inner linear circle a pine marten in its habitat, circular inscription · CARTEA ROŞIE · JDER - DE - PĂDURE · MARTES MARTES meaning "RED BOOK PINE MARTEN" (the scientific name being written with cursive capital letters) Issuing date: 23th of August 2004 Maximum mintage: 500 coins

The Red Book series comprises the following 10 lei silver coins (over to July 2021):

- wildcat and green woodpecker in 2001,

- black stork and European mink in 2003,

- pine marten in 2004,

- imperial eagle in 2005,

- great bustard in 2006,

- European ground squirrel in 2007 and

- white waterlily in 2008.

The series also comprises the following 50 lei coins:

- Eurasian spoonbill in 2011,

- otter and lady's slipper in 2012,

- mute swan and Coenagrion mercuriale damselfly in 2013,

- glossy ibis and the peony Paeonia peregrina in 2014,

- European pond turtle in 2015,

- red-breasted goose in 2016

- maiden pink - Dianthus deltoides in 2018,

- saker falcon - Falco cherrug in 2018,

- summer snowflake - Leucojum aestivum in 2019 and

- Papilio machaon swallowtail in 2020.