So I have a Heuer night diver w/ PVC bezel but cannot find info on this particular model. It's ref# 989.106L. I found some info on the 989.106 but cannot find any on the "L" version. From what I understand the "L" denotes the later version. My watch has a Tag branded crown. I'm wondering if this model came with it or if the part was replaced at some point. Any info would be appreciated. Thanks!