There are some vehicles with features of hull of SU-122 and with angled fuel tanks.
<Features>
・All vehicles have a UZTM type rounded turret.
・All vehicles have angled fuel tanks. Therefore they have four long handrails. (Vehicles with three handrails must have round fuel drums.)
・All vehicles have disk type road wheels same as SU-122.
・All vehicles have UZTM type tracks same as SU-122.
・As long as we can see, they have a UZTM type rear hull panel.
And from sevaral photos of WWII, we can see the followings.
・Vehicles with UZTM turret and with angled fuel tanks never have standard track that was used on ChKZ vehicles.
・Vehicles with UZTM turret and with angled fuel tanks ware photographed in UZTM factory.
・Vehicles with UZTM turret and with angled fuel tanks never have ChKZ type rear hull panel.
Therefore, it is concluded that they are made of UZTM. Not ChKZ.
However, in UZTM in this period, standard production have round fuel drums. And they have UZTM type two-pieced track. We cannot be clarified under what circumstances these vehicles with UZTM turret and with angled fuel tanks were producted. From the scene in the field or in the factory in photos, the period seems to be january - april 1943.
砲塔 Turret;
(UZTM標準型との相違点)
・六角砲塔ウラルマシ生産型(上辺の丸いもの。)のみ。
(Different from UZTM standard model)
· "Soft edge" turret only. No "UZTM" turret.
(UZTM標準型と同じ点)
・砲塔上のペリスコープはPTK-5型1基。
・ピストルポートは両側面に1つづつと、後面に1つ、計3つあり。
・3ピース型の手すりあり。
(Same points)
· A periscope on the left top of the turret. PTK-5 type.
· Pistol port is only on the rear. No pistol port on the side of the turret.
· With handrails of three pieced type.
車体 Hull;
(UZTM標準型との相違点)
・後部に183工場と同じ角型燃料タンクを装備。
・手すりは4ピース型のものが左右側面に2つづつあり。
(Different from UZTM standard model)
· Angled fuel boxes were equipped on the rear panel.
· There are two four-pieced handrails on each side.
(UZTM標準型と同じ点)
・車体後上面パネルの両脇ボルトは4個。車体後上面パネルと後下面パネルの結合ヒンジは3つ。チェリャビンスクとは違う。
・排気管カバーにボルト溝がある。
・ラジエター上面カバーと車体後上面パネルを繋ぐ蝶番は2か所だが、位置が183工場やチェリャビンスクよりも内側に寄っている。蝶番の軸筒の数は10(5+5)。
・エンジンデッキ上に3ピース型の手すり(左右1対)あり。
・牽引具はγ字型で完全溶接の後期型。
・操縦手ハッチ前の跳弾板あり。砲塔周囲の跳弾板なし。
・後部下面のギヤカバーはエッジの立っていない、丸みを帯びた標準的なもの。
・排気管の間のハッチは丸型。183工場と同じ大きさの小さな取っ手付き。
・ラジエター上面カバーとエンジン上面パネルを繋ぐ蝶番は3か所。
・後部フェンダーに補強用の打出し線あり。(戦時中の写真では大変判別しにくいが、T-34、T-34-85ともすべてあります。)
(Same points)
· There are four bolts on the side line of the upper rear panel. Three hinges between the upper rear panel and the under rear panel. (Armour around hinges is not dented like Tamiya's error kit. Edge of armour is straight.)
· There are grooves for bolts on the exaust cover.
· Two wide hinges between the upper rear panel and the upper grill. But different from other factories, the hinges are fixed more inner. The hinge has ten sylinders. (5+5=10)
· With three pieced handrails on the engine deck.
· Front and rear towing devices were late type. Same as T-34-85.
· There is a ricochet bar in front of the driver's hatch. No ricochet bar around the turret.
· Gear covers on the under rear panel is standard rounded type. Not edged type.
· A round transmission hatch between exhaust pipes with a tiny handle same as No.183.
· Three hinges between the upper grill and the engine deck.
· There is a reinforcing line on the rear fender. (It is very hard to see this line in photos in WWII, but all T-34s and T-34-85s have this line.)
足回り Undercarriage;
(UZTM標準型との相違点)
・履帯は狭軌500mm幅の、SUによく見られるもの。
・起動輪は全鋼製の183工場と同じもの(穴の周りの盛り上がりがなく、6つのボルト(リベット)が三角錐のもの。)。
(Different from UZTM standard model)
· Tracks; Narrow 500mm UZTM pattern tracks. This track can be often seen in SU.
· Drive wheels; Full steel type of №183 (Six holes without rimmed edge around the holes, Six low conical bolts, Six ribs.).
(UZTM標準型と同じ点)
・転輪は全てプレス式1942年型(プレス式1940年型から、内側の輪の部品がなくなったもの。112工場と同じ。)。プレス式1943年型(プレス式1942年型から、更にゴムタイヤの溝がなくなったもの。(小穴はあり。))も同時並行で使用。
・誘導輪は全鋼製の後期型。10枚のリブがすべて長いもので、10個の穴の周りに盛り上がりがないもの。ハブキャップボルトは10個。(183工場と同じ)
(Same points)
· Road wheels: All 1942 dish type. (This is basically same as the 1940 dish type, but a inner ring was omitted.) And 1943 dish type (This is basically same as the 1942 dish type, but grooves on the rubber tyre were omitted. (But with tiny holes.)) was parallelly used.
· Idler wheels; Full steel late type of No.183 with ten long ribs. It has ten holes without rimmed edge around the holes. Ten bolts on the hub cap.
SU-122 prototype