Year?
That, I don't know for sure. Somewhere between 1915-18. Sometimes it's a bit hard to specify a year, this is because cars can be built unchanged for a few years, also because there just isn't the information to support the date. I like to state cars as accurately as I can, but if I'm unsure of some details, I would prefer to leave them a bit up in the air, rather than state false information.
Any clarification is always welcome, as long as it is precise and accurate. The main thing for me is, as long as it is correct.