Gold-tone compass pendant necklace, 18-inch chain

I lost my gold-tone compass pendant necklace yesterday afternoon, around 3pm, near the Ferry Building along the Embarcadero in San Francisco. It's an 18-inch delicate cable chain with a small round compass pendant, about 1 cm in diameter. On the back is a tiny 'P' engraved; the chain shows a few micro-scratches but otherwise the piece looks okay. It was a gift from my grandmother and means a lot to me—I've worn it every day for years. If you’ve seen it, email me at [email protected] with any info; I’d really appreciate getting it back.