You can try:
dmidecode -t 2
# dmidecode 3.3
Getting SMBIOS data from sysfs.
SMBIOS 2.6 present.
Handle 0x0200, DMI type 2, 9 bytes
Base Board Information
Manufacturer: Dell Inc.
Product Name: 01V648
Version: A06
Or
root@nfs2:/# lshw | more
nfs2
description: Rack Mount Chassis
product: PowerEdge R410
vendor: Dell Inc.
serial: 1SD07V1
width: 64 bits
capabilities: smbios-2.6 dmi-2.6 smp vsyscall32
configuration: boot=normal chassis=rackmount uuid=44454C4C-5300-1044-8030-B1C04F375631
*-core
description: Motherboard
product: 01V648
vendor: Dell Inc.
physical id: 0
version: A06