B737 Approach Ref page T symbol next to ILS FREQ

[gudtjq0475]

Hi.
I found something curious thing on approach ref page.
Normally, you can see ILS FREQ / CRS on L4, APPROACH REF PAGE.
but I found T symbol next to CRS.

According to FCOM, It says
"Displays front course, if an ILS, localizer, or localizer back course is displayed on 4L. If the course is true displays is suffixed with 'T'."
I can't understand why it is displayed.
Plz give me detailed information.

[BraceBrace]

Which airport?

[gudtjq0475]

Wbkk rwy20

111.1 ikkd 203 t

[KingAir1978]

Is it an airport in the area around the magnetic north pole?

[gudtjq0475]

No It's not. WBKK is in Malaysia