Aurora sub-brand Olo fountain pens (4). Aurora produced Olo pens, similar to that of their higher tier pens but button fill and with plain trim. These examples from the 1940s, thin metal trim shows wear though all pens with good colour and original Olo fine flexible nibs, three in 14K gold and one steel. Three pens in marbled pattern with black (grey, green and blue) along with gold and black lined pattern example. Length 5 1/4 inches and 6 1/4 inches posted, filling mechanisms button fill. Overall fair condition given the trim wear, otherwise good to excellent.