For my reception of their program in Korean language I received this detailed e-QSL from KTWR Trans World Radio Guam.

eQSL TWR Asia from Guam showing their antennas in Guam
eQSL KTWR Guam details
Detailed eQSL from KTWR Guam

Checking my files I found that it was almost 40 years ago that I QSL-ed KTWR Guam for the first time. This is the card I received for my reception on 11840 kHz, December 30th, 1983.

1984 QSL card from KTWR Trans World Radio Guam