[Hero, G2 Touch Android Development] pulser_g2:
OK. In the code box is the build.prop file. Suggests a build date of February 26...

ro.ril.ecc.HTC-ELL=92,93,94
ro.ril.ecc.HTC-Russia=01,02,03,04
ro.ril.ecc.HTC-FRA=123,911
ro.ril.ecc.HTC-EastEurope=92,93,94
ro.ril.ecc.HTC-WWE=999
ro.ril.enable.a52.HTC-ITA=1
ro.ril.enable.a53.HTC-ITA=1
ro.ril.enable.a52.VODA-Portugal=0
ro.ril.enable.a53.VODA-Portugal=1
# begin build properties
# autogenerated by buildinfo.sh
ro.build.id=ERD79
ro.build.display.id=ERD79
ro.build.version.incremental=139791
ro.build.version.sdk=7
ro.build.version.codename=REL
ro.build.version.release=2.1
ro.build.date=Fri Feb 26 19:48:39 CST 2010
ro.build.date.utc=1267184919
ro.build.type=user
ro.build.user=u70000
ro.build.host=Oven-X04
ro.build.tags=release-keys
ro.product.model=HTC Legend
ro.product.brand=htc_wwe
ro.product.name=htc_legend
ro.product.device=legend
ro.product.board=legend
ro.product.cpu.abi=armeabi
ro.product.cpu.abi2=
ro.product.manufacturer=HTC
ro.product.locale.language=mdpi
ro.product.locale.region=
ro.wifi.channels=
ro.board.platform=msm7k
# ro.build.product is obsolete; use ro.product.device
ro.build.product=legend
# Do not try to parse ro.build.description or .fingerprint
ro.build.description=1.23.405.1 CL139791 release-keys
ro.build.changelist=139791
ro.product.ua=
ro.build.fingerprint=htc_wwe/htc_legend/legend/legend:2.1/ERD79/139791:user/release-keys
ro.product.version=1.23.405.1
keyguard.no_require_sim=1
# end build properties
#
# system.prop for legend
#

rild.libpath=/system/lib/libhtc_ril.so
wifi.interface = tiwlan0
# Time between scans in seconds. Keep it high to minimize battery drain.
# This only affects the case in which there are remembered access points,
# but none are in range.
wifi.supplicant_scan_interval = 15

# density in DPI of the LCD of this board. This is used to scale the UI
# appropriately. If this property is not defined, the default value is 160 dpi.
ro.sf.lcd_density = 160

# Default network type
# 0 => WCDMA Preferred.
ro.telephony.default_network = 0

# For the agps default value
ro.ril.def.agps.mode = 2
# For 7227 projects ,default enable AMR-Wideband (Sam@1231: WSD request to disable it by default)
# ro.ril.enable.amr.wideband = 1

# For emmc phone storage
ro.phone_storage = 0

#
# This file describes the media capabilities and profiles
# using system properties.
#
# Note: The property key and value has some length
# limit as defined by PROPERTY_KEY_MAX and
# PROPERTY_VALUE_MAX, respectively
#
# WARNING: We may not use system properties for specifying
# media capabilities and profiles in the future
#
ro.media.enc.file.format = 3gp,mp4
ro.media.enc.vid.codec = m4v,h263
ro.media.enc.vid.h263.width = 176,640
ro.media.enc.vid.h263.height = 144,480
ro.media.enc.vid.h263.bps = 64000,1600000
ro.media.enc.vid.h263.fps = 1,30
ro.media.enc.vid.m4v.width = 176,640
ro.media.enc.vid.m4v.height = 144,480
ro.media.enc.vid.m4v.bps = 64000,1600000
ro.media.enc.vid.m4v.fps = 1,30

# For FOTA setting (leave empty value to use default)
ro.htc.checkin.url = http://andchin.htc.com/android/checkin
ro.htc.checkin.crashurl = http://andchin.htc.com/android/crash

#
# ADDITIONAL_BUILD_PROPERTIES
#
ro.url.legal=http://www.google.com/intl/%s/mobile/android/basic/phone-legal.html
ro.url.legal.android_privacy=http://www.google.com/intl/%s/mobile/android/basic/privacy.html
ro.com.google.networklocation=1
ro.setupwizard.mode=DISABLED
ro.config.ringtone=Innovation.mp3
ro.config.notification_sound=Color.mp3
ro.config.alarm_alert=Light.mp3
ro.config.cal_notification=Vector.mp3
ro.config.msg_notification=Ascend.mp3
ro.setupwizard.mode=OPTIONAL
ro.com.google.clientidbase=android-htc
ro.url.legal=http://www.google.com/intl/%s/mobile/android/basic/phone-legal.html
ro.url.legal.android_privacy=http://www.google.com/intl/%s/mobile/android/basic/privacy.html
ro.com.google.locationfeatures=1
ro.setupwizard.mode=DISABLED
ro.com.google.gmsversion=2.1_r1
dalvik.vm.dexopt-flags=m=y
net.bt.name=Android
ro.config.sync=yes
dalvik.vm.stack-trace-file=/data/anr/traces.txt

The numbers etc. could all be faked, but I doubt it. Now browsing through the /system to see what's there...