In this particular case my list would have helped you as the camera is quite old stock
Take a look at the list here:
https://www.eevblog.com/forum/reviews/flir-e4-the-useful-information-thread/msg332428/#msg332428A camera with S/N 6392 17xx is identified as FW1.22 and calibrated on 3 April 14. You will see that there were many cameras produced after that serial number that had fw1.22.
See extract below:
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6392 023x 21 Mar 1.22.0 E4 V1.1L
6392 17xx 03 Apr 1.22.0 E4 V1.1L
6392 21xx 08 Apr 1.22.0 E4 V1.1L
6392 29xx 11 Apr 1.22.0 E4 V1.1L
6392 4xxx ? 1.22.0 E4 V1.1L
6392 5xxx 28 Apr 1.22.0 E4 V1.1L
6392 54xx 28 Apr 1.22.0 E4 V1.1L
Not in Camera @ 18 May 2.1.0 RELEASED on FLIR web site - Built 16 May
6392 85xx 23 May 2.1.0 E4 V1.2L
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Note my warning about recalled stock however....nothing is a certainty, but the odds are definitely in your favour for an upgradable camera
If you have not already done so, I recommend that you read my E4 Useful information thread as it answers many questions for those new to the E4.
https://www.eevblog.com/forum/reviews/flir-e4-the-useful-information-thread/msg332104/#msg332104I hope all goes well and you enjoy your camera.
Aurora