Need to identify this russian medal

[comrade135]

im quite sure that this medal is imperial, and from looking close up it may have been another color. please help me identify this medal

[Dimas]

From what I see it must be naval ingeneer academy in St Petersburg

[comrade135]

thank you for your assessment, im not trying to sell it, but i was wondering if you could tell me what it may be worth, or tell me how i could find out