Jay Shelton recently bought a box of 2018 BBM 1st Version cards and sent me some stats and photos from his box break.
The box contained 20 packs and each pack contained 10 cards so (obviously) each box contained 200 cards. Jay's cards broke down as follows:
1 Japanism insert card
2 Gemstone insert cards
19 Cross Universe regular cards (17 unique)
1 Cross Universe "Gold Foil" parallel card (084/100)
6 team cards
1 Green Signature Parallel card (Takeya Nakamura 09/10)
4 Silver Parallel cards
1 Gold (or "Foilboard") Parallel Rookie card (Etio Tanaka 138/200)
1 "Secret" parallel card (Hideto Asamura)
164 regular cards (150 unique)
Jay mentioned that the Nakamura Green Signature parallel had a matte finish on it rather than the normal glossy finish that the other cards have. He also mentioned that each pack had a Cross Universe card in it - either a regular one or a parallel.
Here's the photos Jay sent me:
Thanks for sharing Jay!