Recommendation is to store cameras with shutter released, but it should not do too much harm if it was stored tensioned.
IIRC the X-700 has an electronic shutter, so the springs just provide tension but aperture and closing are circuit-controlled. If the electronics work well, probably there is no problem.
I have unintentionally left mechanical cameras with shutter cocked for years, without noticeable harm to shutter accuracy. It may well depend on the specific camera mechanism, or even in the shutter speed selected (sometimes, faster speeds use a different, stronger spring). No 100% sure answer can be given to your question.
You can test speeds of 1/60 and faster with a TV screen (do not know if it works with modern plasma types, but it did with the CRT types).
You could probably work out a sound-based check. Opening and closing the shutter produces sounds, with silence in between. The interval between opening and closing can be measured if you have access to a recorded audio wave, using a PC audio input or a cell phone, and an application to study the waveform. It would be best to compare the sound of the camera under study with a similar one that is known to be good.
Last Edit: May 12, 2019 19:22:32 GMT -5 by julio1fer