the shafts are suppose to be black unless they custom ordered for you

i have a set that i think are fake as well. the lines are not sharp on the back of the club head and there are gaps between the plastic badge and the clubhead itself. you might take a look at that. also the number stamping on the soles of the clubheads are not sharp

aliexpress and dhgate is where most fake clubs come from. they even get accurate serial numbers. here is a decent video on things to look out for www.youtube.com/watch

You can check with Titleist customer service (listed at the bottom of this website). Since they were essentially all custom ordered, the number shouldn't be too hard to check. The chrome shaft is not necessarily a true sign. The base option shafts were black, but if the preferred shaft did not have a black counterpart, they were built with the chrome shafts. We did a tour of the plant in March, and one station was building black sets, and not all had black shafts.

how’s the ball striking on them? You can probably tell by the feel of them

They seem fake, the groves really look skew. Check the smell of the grips, some Chinese fake grips smell like a rotten egg. Compare them with a club from a retail store, should look the same even if you compare it against a chrome set.

Titleist does not make or install long ferrells. They use the short ones. I believe those are fake...

Serial number font is off, club number is off, paint looks weird, I say fake.

Serial numbers start with a 0 or 1.......

My mate was in a similar situation last year. We found this image, among others, which showed some differences. The font on the 5 iron is easy to compare.