As seen in the answer here , Karna had Vijaya bow. Karna had obtained it from Parashurama, who in turn had obtained it from Indra.
But it seems that Rukmi (brother of Rukmini) too had Vijaya bow that belonged to Indra. Udyog Parva mentions that he was a friend of Indra and had obtained it from his preceptor Drona. Don't think it was the Kuru guru Drona as the former is mentioned somewhat differently
And Rukmi was a disciple of that lion among the Kimpurushas who was known by the name of Drona, having his abode on the mountains of Gandhamadana
It is stated
And that mighty-armed warrior had obtained also the bow named Vijaya of celestial workmanship, belonging to the great Indra, and which was equal to Gandiva in energy and to also Sarnga (held by Krishna).
And he had this bow with him when he came to offer his services to Pandavas
And Rukmi having obtained the bow called Vijaya whose twang resembled the roar of the clouds came to the Pandavas
Now Karna and Rukmi had fought when Karna had gone on his digvijay yatra in which Karna seems to have gotten the better of Rukmi
Then going to the south, Karna vanquished the mighty charioteers (of that quarter) and in Dakshinatya, the Suta's son entered into conflict with Rukmi. After having fought dreadfully, Rukmi spake to the Suta's son saying, 'O foremost of monarchs, I have been pleased with thy might and prowess. I shall not do thee wrong: I have only fulfilled the vow of a Kshatriya. Gladly will I give thee as many gold coins as thou desirest.'
But there is no mention of either of the Vijaya bows in this encounter. Besides Rukmi approaching Pandavas was after the encounter with Karna
So question is if there are other references to two Vijaya bows belonging to Indra? If there is only one bow then who was holding it and at what point in time during Mahabharata.