Definitely was York Optical.
At least that's what they called themselves when I visited just over 10 years ago.
Sad to see it go.
There was also another dealer at Crows Nest I visited. Astro Optical Supplies. Closed too I believe.
And one at Broadmeadow (near Newcastle) I spent a lot of time and money there when I worked at nearby Lambton.
I think is still operating. Survey and Instrument Specialists.
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