Electronic – Help on unknown part

See images below :

I obtained this component from an old radio set ( possibly 90s made). It was attached to the tuning dial, so most likely it is variable capacitor I believe. It has absolutely nothing written on it except on image 1, which is
C1, C2, C3, and C4 as seen. The text in image 3 (wp0710) returns no result.

Also in image 3, the 2nd leg on left is internally attached to the capacitor.

Since this is my first hands on experience, I am absolutely clueless what are its various legs, and how to use this capacitor. I don't know how to wire this. If it would have been a simple 2 leg capacitor, it was no problem. But what to do in this case ?More important!y, how do I find out over what range does it vary. I have a digital multimeter at my disposal. Any help and additional information is welcome.

Additional information : The radio from which it was obtained was a 5 band radio : Mw(540 to 1600 khz) SW ( 60 to 19 m) FM( 88 to 108 mhz) Tv1(65 to 75 mhz) and TV2 (175 to 230 mhz). Also there was a single piece of it in radio.