X-cut. NOT PROTON EXCHANGED.
Two samples exist with this number, one is a Resistor Bridge EO with 200nm of Chrome.
It looks like the following:
1■____■7 2■¯¯¯¯■8
3■____■9 4■¯¯¯¯■10
5■____■11 6■¯¯¯¯■12
1-2: 18.2Ω 3-4: 12.5Ω 9-10: 71.3Ω 11-12: 9.0Ω