The part is from Jonsered CS2145 which are made on 2005 of April (last picture). The part is used. Cleaned and ready for use. 

Part number is 503 89 30-01.

Disassembly of chainsaw you can see on youtube. The link is below.

Husqvarna

435 (2008-05) Chainsaw

435 E (2008-05) Chainsaw

440 E (2008-05) Chainsaw

445 (2007-03) Chainsaw

445 (2007-09) Chainsaw

445 E (2007-03) Chainsaw

445 E (2007-09) Chainsaw

450 E (2007-03) Chainsaw

450 E (2007-09) Chainsaw

357 XP (EPA) (2003-04) Chainsaw

357 XP (EPA) (2004-05) Chainsaw

359 (2001-01) Chainsaw

359 (2003-04) Chainsaw

359 (2004-05) Chainsaw

359 EPA (2001-10) Chainsaw

359 EPA (2003-04) Chainsaw

359 EPA (2004-05) Chainsaw

340 (2001-09) Chainsaw

340 (2004-03) Chainsaw

340 (2005-05) Chainsaw

340 (2006-06) Chainsaw

340 (2007-01) Chainsaw

340 E (2005-05) Chainsaw

340 E (2006-06) Chainsaw

340 EPA (1999-09) Chainsaw

340 EPA (2003-01) Chainsaw

340 EPA (2004-03) Chainsaw

345 (2001-09) Chainsaw

345 (2004-03) Chainsaw

345 (2007-01) Chainsaw

345 E (2005-05) Chainsaw

345 E (2006-06) Chainsaw

345 EPA (2003-01) Chainsaw

345 EPA (2004-03) Chainsaw

346 XP (1999-01) Chainsaw

346 XP (2001-06) Chainsaw

346 XP (2003-06) Chainsaw

346 XP (2004-03) Chainsaw

346 XP (2007-02) Chainsaw

346 XP (2007-08) Chainsaw

346 XP EPA (2004-03) Chainsaw

350 (1998-02) Chainsaw

350 (2001-09) Chainsaw

350 (2004-03) Chainsaw

350 (2005-05) Chainsaw

350 (2006-06) Chainsaw

350 EPA (2006-06) Chainsaw

350 EPA (1999-09) Chainsaw

350 EPA (2003-01) Chainsaw

350 EPA (2004-03) Chainsaw

351 (2001-06) Chainsaw

351 EPA (1999-09) Chainsaw

353 (2004-03) Chainsaw

353 (2007-02) Chainsaw

353 (2007-08) Chainsaw

353 EPA (2004-03) Chainsaw

353 EPA I (2002-09) Chainsaw

357 (2001-01) Chainsaw

357 EPA (2001-10) Chainsaw

357 XP (2003-04) Chainsaw

357 XP (2004-05) Chainsaw

345EPA (1999-09) Chainsaw

450 (2011-07) Chainsaw

450 (2010-09) Chainsaw

536 LIXP Chain Saw

436LI Chain Saw

T536LIXP Chain Saw

445 E II Chain Saw

445 II Chain Saw

135 (2011-08) From Chain Saw

Jonsered