Idk if this will help you all or not but I found where someone did a system dump of one and I grabbed the build prop out of it:
##### Merging of the /util/data/semc_kernel_time_stamp.prop file #####
ro.build.date=Fri Oct 14 20:17:28 2011
ro.build.date.utc=1318616248
ro.build.user=SEMCUser
ro.build.host=SEMCHost
##### Final patch of properties #####
ro.build.product=R800x
ro.build.description=R800x-user 2.3.4 4.0.2.E.0.57 xv_u3w test-keys
ro.product.name=R800x_1245-4101
ro.product.device=R800x
ro.build.tags=release-keys
ro.build.fingerprint=verizon/R800x_1245-4101/R800x:2.3.4/4.0.2.E.0.57/xv_u3w:user/release-keys
######################## Customized property values #########################
ro.semc.version.cust=1245-4101
ro.semc.version.cust_revision=R43D
ro.semc.emergency.masterreset=true
ro.semc.dashboard.sliderlaunch=false
ro.com.google.clientidbase.am=android-verizon
ro.com.google.clientidbase.ms=android-google
ro.config.ringtone=VZW_Airwaves.mp3
ro.product.brand=verizon
ro.cdma.home.operator.alpha=Verizon
ro.cdma.home.operator.numeric=310004
ro.cdma.homesystem=64,65,76,77,78,79,80,81,82,83
ro.cdma.otaspnumschema=SELC,1,80,99
ro.network.signalbar=5
#########################################################################
################# Updating of the SW Version #################
ro.semc.version.fs_revision=4.0.2.E.0.57
ro.build.id=4.0.2.E.0.57
ro.build.display.id=4.0.2.E.0.57
##### Values from product package metadata #####
ro.semc.product.model=R800x
ro.semc.ms_type_id=AAJ-6880004-BV
ro.semc.version.fs=VERIZON
ro.semc.product.name=Xperia PLAY
ro.semc.product.device=R800
ro.product.model=R800x
# begin build properties
# autogenerated by buildinfo.sh
ro.build.version.incremental=xv_u3w
ro.build.version.sdk=10
ro.build.version.codename=REL
ro.build.version.release=2.3.4
ro.build.type=user
ro.product.board=
ro.product.cpu.abi=armeabi-v7a
ro.product.cpu.abi2=armeabi
ro.product.manufacturer=Sony Ericsson
ro.product.locale.language=en
ro.product.locale.region=US
ro.wifi.channels=
ro.board.platform=msm7x30
# ro.build.product is obsolete; use ro.product.device
# Do not try to parse ro.build.description or .fingerprint
# end build properties
#
# system.prop for zeus
#
# Notify the system that the RIL only signals once
ro.telephony.call_ring.multiple=0
rild.libpath=/system/lib/libril-qc-1.so
rild.libargs=-d /dev/smd0
persist.rild.nitz_plmn=
persist.rild.nitz_long_ons_0=
persist.rild.nitz_long_ons_1=
persist.rild.nitz_long_ons_2=
persist.rild.nitz_long_ons_3=
persist.rild.nitz_short_ons_0=
persist.rild.nitz_short_ons_1=
persist.rild.nitz_short_ons_2=
persist.rild.nitz_short_ons_3=
DEVICE_PROVISIONED=1
persist.ro.ril.sms_sync_sending=1
persist.service.backcover=1
ro.semc.sols.product-code=97
ro.semc.sols.company-code=5
# Disable strict mode checking
persist.android.strictmode=0
# Constant values for Battery test in Service menu
ro.semc.batt.capacity=1500
ro.semc.batt.test.z_threshold=50
ro.semc.batt.test.min_level=70
# Do not change this value.
# This is to be able to identify all _ZEUS_ products
# past, present and future without needing to know
# all product-names we'll be using in the future.
# Again, only Zeus and it's variants gets this value,
# no-one else.
ro.semc.product.parent.name=zeus
#
# ADDITIONAL_BUILD_PROPERTIES
#
ro.sf.lcd_density=240
dalvik.vm.heapsize=32m
wifi.interface=eth0
wifi.supplicant_scan_interval=15
ro.semc.dashboard.xperiaplay=true
ro.semc.dashboard.searchuri=http://pss.dl.playstation.net/pss/content/list.html
ro.com.google.gmsversion=2.3_r7
keyguard.no_require_sim=true
ro.setupwizard.mode=REQUIRED
ro.com.android.dateformat=MM-dd-yyyy
ro.com.android.dataroaming=false
ro.ril.hsxpa=1
ro.ril.gprsclass=10
ro.telephony.default_network=4
ro.config.notification_sound=OnTheHunt.ogg
ro.config.alarm_alert=Alarm_Classic.ogg
ro.com.google.clientidbase=android-sonyericsson
dalvik.vm.dexopt-flags=m=y
net.bt.name=Android
dalvik.vm.stack-trace-file=/data/anr/traces.txt
ro.drm.active.num=4
ro.drm.active.0=semc,1
ro.drm.active.1=cmla,0
ro.drm.active.2=viaccess,0
ro.drm.active.3=marlin,1
ro.service.swiqi.supported=true
persist.service.swiqi.enable=1