The seller said it wasn't a conversion when I asked her, but it's so plain compared to what you usually see being sold. As Slohairt pointed out, it doesn't have the epaulets and scalloped pocket flaps. I received the seller's answer answer after Arlen's. So, it is highly likely it isn't a conversion. Although, the seller couldn't say for certain.

I'm glad it makes you feel good, tartan hiker. It's an interesting jacket.