If you still want to try, here is the situation with legacy versions: Last Compatible Versions : Versions like
Downloading APKs from third-party sites to bypass version restrictions is not recommended . These files can contain malware or spyware, and since the app is no longer updated for your system, your data remains vulnerable to security flaws. What You Can Do whatsapp messenger apk android 412 full
It looks like you're looking for a for Android 4.1.2 (Jelly Bean), possibly a "full" version. If you still want to try, here is