As @hobbs implies, \$\mu=\mu_{_0}\cdot\mu_r\$, where \$\mu_{_0}\$ is the constant for vacuum (no ferromagnetic matter placed within the inductor). While \$\mu_{_0}\$ is a well-known constant that operates most places in the universe we know, the value of \$\mu_r\$ depends very strongly on the magnetic behavior of matter that resides within/nearby the inductor. And it can range very widely. Seeing 185:1 wouldn't be strange, at all. If it's just air-core, then many other details matter about how it is constructed. Perhaps a photo? Is the inductor single-layer wound?
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