ꭃ

Description
The curves may not join at the top, but it's not clear whether this is intentional or due to the printer's hack of filing down metal type and fitting them together. The left side might be either an ɑ or an o. If the first, it would be ⟨ꜵ⟩ with a script a; if the latter, it would duplicate ⟨ꝏ⟩.