META-INF/MANIFEST.MF in ${JAVA_HOME}/jre/lib/ext/sunec.jar for 7u11 nightly build contains the following:
Manifest-Version: 1.0
Created-By: 1.6.0_14 (Sun Microsystems Inc.)

Name: sun/security/ec/SunECEntries.class
SHA1-Digest: GUgsYjGaRS5fxSGaAx6y0FdJH3A=
...

Manifest of sunec.jar for 7u9 b05 contains the following:
Manifest-Version: 1.0
Implementation-Vendor: Oracle Corporation
Implementation-Title: Java Runtime Environment
Implementation-Version: 1.7.0_09
Implementation-Vendor-Id: com.sun
Specification-Vendor: Oracle Corporation
Specification-Title: Java Platform API Specification
Created-By: 1.6.0_18 (Sun Microsystems Inc.)
Specification-Version: 1.7
Extension-Name: javax.crypto

Name: sun/security/ec/SunECEntries.class
SHA1-Digest: GUgsYjGaRS5fxSGaAx6y0FdJH3A=
...