I think we've down a bit of a rabbit hole with what's a proxy and what's just hiding in another range! Let's see how the much use this board gets and how many lists we see, and then we can decide if it needs a finetune.
Here are some SCW items 'hiding in another range'. The question is, do you need to point this out to people? Frankly, I doubt it.
British WW1BP9 4.5” Howitzer Used by the Republic. Originally supplied to Tsarist Russia during WW1, sold to the Republic by the Soviets.
BP11 60pdr HG Used by the Republic. Originally supplied to Tsarist Russia during WW1, sold to the Republic by the Soviets.
French WW1F18 Char Schneider A few former pre-war Spanish army Schneider tanks were used by the Republic during the early fighting.
F7/7a 155mm Howitzer Not quite sure what this represents. The 155C M1917 Schneider was standard in the pre-war Spanish army. Used by the Republic and the Nationalists. The 152mm howitzer M1910 was essentially the same weapon produced under licence by Imperial Russia and was supplied by the Soviets to the Republic.
F39 FT-17 round turret, MG The FT-17 was the standard tank in the pre-war Spanish army. They seem to have been MG armed and typically the round turret versions. There were 15 available in 1936; the Republic had 9 of them.
F38 FT-17 round turret, 37mm A number of additional FT-17s with 37mm guns in round turrets were acquired by the Republic from Poland.
German WW1GP5/5a 77mm FG Examples of the German 7.7cm FK96 were supplied to the Republic by the Soviets. They had been captured by the Russians during WW1.
GP7/7a 105mm Howitzer Examples of the short-barrelled German 10.5cm FH 89/09 were supplied to the Republic by the Soviets. They had been captured by the Russians during WW1.
GP16 75mm minenwerfer These were supplied to the Republic by the Soviets. They had been captured by the Russians during WW1.
Russia WW1RP4 76.2mm FG The Soviets supplied numbers of Putilov 76.2mm M1902 to the Republic.
German WW2GRA4 37mm AT gun. The 3.7cm Pak36 was supplied to the Nationalists by Nazi Germany.
GRA23 8.8cm FLAK 36 Supplied to the Nationalists by Nazi Germany it was operated mainly by elements of the Condor Legion.
GRV1 Panzer I Ausf A The most numerous Nationalist tank, supplied largely in Ausf A form by Nazi Germany.
GRV2 Panzer I Ausf A command Some Pz Is Ausf A command vehicles were supplied to the Nationalists by Nazi Germany.
GRV3 Panzer I Ausf B The Nazis provided lesser numbers of the Ausf B to the Nationalists.
French WW2FRE54 75mm field gun spoked wheels In addition to standard 75mm mle 1897 field guns acquired from a variety of sources, the Soviets supplied numbers of Mle 1897 field guns to the Republic in 76.2mm.
FRE57 Canon de 105 mle 13 The Republic acquired some of these French guns and were supplied with numbers of the Russian licence built version in 107mm by the Soviets.
Poland WW2
POL17 wz.36 37mm AT gun This is the Swedish Bofors M38. The Republic acquired at least 20 examples.
POL29 wz 1913 Schneider 105mm This is the same as FRE57 above.
Soviet WW2
SVA1 45mm AT gun Up to approximately 200 examples of the 45mm M1932 anti tank gun was supplied by the Soviets to the Republic.
SVA8 76.2 FG spoke wheels Not quite sure what this item is. The Soviets supplied significant numbers of the 76.2mm Divisional Gun M1902 and M1902/30 to the Republic.
SVV28 ZIS-5 truck One of the many types of truck supplied by the Soviets to the Republic.
SVV30 ZIS-6 truck See above.
SVV32 BA-6 armoured car The Soviets supplied at least 20 of these armoured car to the Republic. Captured ones were used by the Nationalists.