Steph never had a logo in her original Spoiler days, no. Since her costume was just something she threw together out of old clothes, and Batman would only ever accept her into the family for five minutes at a time before changing his mind and banishing her (seriously, he did that like all the time), there was never really a need for one. I think the "Night of the Monster Men" crossover was the first appearance of logos for Steph and post-Flashpoint Cass. (Pre-Flashpoint Cass was never active as anyone but Batgirl, so her logo was always the yellow outline Bat symbol.)
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