The "dreaded #2" is dreaded precisely because it's been used as a "lump size" for all the specials and oddities.
150/2.8 Xenotar, 150/3.5 Xenar, 165/6.8 Angulon, 180/4.5 Xenar and 240/5.6 Symmar have all been sold in standard #2 Compur. However they have also all been sold in "specials", one of which is unfortunately listed as "#2" on the SK Grimes website.
Jim: You do realise, I hope, that the 165 Angulon was originally sold as a convertible? Rear is about 270mm f:12, front about 320mm f:14 if I remember correctly. So that and a 240 Symmar gives you 165, 240, 270, 320 and 420mm. But I don't know what you get if you combine an Angulon rear with a Symmar front cell...