$25 · Vintage Zodiac Brand Pressure Gauge With Original Case

I used to own a 1969 Inflatable Zodiac used for diving for most of its life. I sold the boat a long time ago, but found this gauge to it in my camping gear. I think it's probably a collectible, but has practical uses as well. My mechanic uncle says the gauge has a common fitting and can be used on other things. I can't seem to find it anywhere online to know the actual value, but I imagine its worth at least $25. It's in excellent condition and comes in it's original case. Located in South Nanaimo If the ad is up, its available Email or text preferred