Time to scout out some silicon! The backside of this board is devoid of chips, so we'll save our glue-fighting powers for another day. Meanwhile, here's what's floating around topside:

Apple A9 APL0898 SoC + Samsung K3RG1G10BM-BGCH 2 GB LPDDR4 RAM (as seen in the iPhone 6s)

SK Hynix H23QEG8VG2ACR 32 GB NAND flash storage

2x Broadcom BCM5976 touch controllers—as seen in iPhones 5, 5c, 5s, 6, 6 Plus, SE, as well as trackpads in MacBooks, MacBook Airs and Pros, and the last two generations of iPads

Apple 343S00144-A0 and 338S1213 power management and audio codec respectively

NXP 67V04 (PN67V) NFC Controller as seen in the iPhone 7 and Apple Watch Series 2

NXP Semiconductor CBTL610A38 USB charging IC, as seen in the iPhone 7

Apple/USI 339S0038 Wi-Fi module