The 155 mm GTC was the planned replacement for the AMX-13 based Mk F3 of 1962, protecting the crew inside a turret : r/tanks
Amx13 F3 by Zaleski007 on DeviantArt
AMX 13 F3 AM - 1 VS 5 - World of Tanks Gameplay - YouTube
War Thunder - In 1966, 53 years ago, the AMX-13/90 first appeared. Sporting a newly mounted 90mm F3 medium-pressure gun in a FL-10 series turret, it was more effective in firing HEAT
Amx 13 hi-res stock photography and images - Alamy
AMX-13 155mm F3, Tanks in the Muse des Blinds, France, pic-2 Stock Photo - Alamy
AMX 13/155 1/35 Heller 81151 - Plastic Model Kit USAMODELKITS.COM
AMX 13 F3 155 : r/WorldofTanks
AMX 13 F3 AM - Global wiki. Wargaming.net
French AMX 13 F3 155mm SPG 1/200 (CUB8BJLAY) by MastersofMilitary