We have NO idea what year model trailer you have, and yes, COMPLETE model number/year are important since model features are changed from year to year as production trailers are assembled.
That said, you can compare the "current model brochures" and pretty much determine that the 38FQ was/is only produced in the Goshen facility. That makes ALL 38FQ models "eastern editions". In the two brochures, you'll find these designations:
EASTERN Brochure: The 38FQ is listed by that designation
WESTERN Brochure: The 38FQ is listed (by the floorplan) as Eastern (in RED).
To my knowledge, the model designation decal (foil decal next to the main entry door) on all western edition trailers is marked with the designator WE at the end of the model number. Example: 260TBWE vs 260TB.
To confirm if you're still "unsettled" you can call the Keystone Customer Service department at (866) 425-4369 during normal business hours, give them your trailer VIN and they can, from the VIN, tell you specifically where your trailer was assembled.
All that, "the condensed version" is that using available information, 38FQ was only constructed in Goshen, so ALL 38FQ models are "eastern editions".
EASTERN Edition brochure:
https://keystone-rv-dealer-app.cdn.p...ure_8.5x11.pdf
WESTERN Edition brochure:
https://keystone-rv-dealer-app.cdn.p...ure_8.5x11.pdf