Pair of Ex-Royal Navy Modulator Transformers A.P.192763 + A.5957
AP19273 (the smaller one):
1-2: 70R 3-4: 320R 5-6: 7500R
A.5957:
1-2: 1R 2-3: 9R 1-3: 10R 1-4: 18.5R 2-4: 17.5R 3-4: 9R