Not a particularly pretty example, but one to add into the mix of the small number of 'G.B.& R' / 'Phöbus' period of Phoebus stove production. An in-depth discussion here substantially places the 'G.B.& R' (Gerson, Boehm & Rosenthal) period as being pre-1916. The fat looking riser is a large 19mm diameter which seems to have been standard for Phoebus stoves of that era. The photos will say most that needs to be said about this example. The peculiar mix of odd ancillary parts, including one Soviet era Russian stove leg will be obvious. The unbranded filler cap and pump rod end also appear to have been nickel plated. It has now made it to the UK from Ukraine where, however it got there, it seemed to have been at least since WW2. A remarkable survivor if nothing else!