HG 1/144 Zaku I “Old Zaku” (Gundam Thunderbolt Ver.): Big Size Official Image, Info 18 March 2014 by Gunjap HG 1/144 Zaku I “Old Zaku” (Gundam Thunderbolt Ver.): Big Size Official Image, Info HG 1/144 ザクI“旧ザク”(ガンダムサンダーボルト版) Release date: June 2014 – Price: 1,944 Yen