Could be SPI, but also could be an 8-bit parallel interface. The 11x data lines with 10R series resistors makes me think the latter. A typical parallel interface would be 8 (or 16) data lines, clock, data/command select, and reset, which lines up with those 11 obvious connections well enough. There are 18 contacts used on the FPC, so that leaves one remaining signal, which could be a sync line to prevent tearing, an interface mode select line or something, or even unused.
If you can trace those lines back to the MCU, you may be able to confirm the assignments by checking against the functions available on those pins. It's fairly common to use an MCU's parallel memory interface to drive parallel LCDs, but it could also be driven from a GPIO port. If it's using SPI, then of course you'd expect to see some of those connections land on an SPI interface.
In any case, do you have a logic analyzer or multichannel oscilloscope you can use to probe the pins? If you can probe four or more of those signal lines at once it should be fairly easy to find out what's going on with the interface -- the patterns on the clock, d/c, reset, and data lines will be very distinct from each other. It's possible to do with a 2-channel scope as well, but will be harder to see the relative timing of the various signals. Figuring out the assignments of the individual data lines will be harder.
Are you trying to reuse the display for another project, or trying to find a replacement?
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