The Bf.109G-6 we have (with Gallandpanzer and standard frame canopy, standard sized vertical stab) was built in Autumn, 1943, and included Werk Nummer production batches 20000, 22100, 26000, 27000, 140000, 160000, 161000, 162000, 163000, 164900, 165000, 166000, 410000, 411000, 412000, 413000, 440000, 441000, and 442000.
'About 80' aircaft in Werk Nummer block 20000-20800, built at WNF, were Bf.109G-6/U4's, and aircraft in Werk Nummer block 440000-441000 built at Erla were also Bf.109G-6/U4's.