How do I determine which logic board I own?

[blackxacto]

Hardware Overview:
Model Name: iMac
Model Identifier: iMac19,1
Processor Name: 8-Core Intel Core i9
Processor Speed: 3.6 GHz
Number of Processors: 1
Total Number of Cores: 8
L2 Cache (per Core): 256 KB
L3 Cache: 16 MB
Hyper-Threading Technology: Enabled
Memory: 64 GB
System Firmware Version: 1715.40.15.0.0
OS Loader Version: 540.40.4~45
SMC Version (system): 2.46f12
Serial Number (system): xxxxxxxx
Hardware UUID: 8D8775C9-4920-5CEB-BAB5-C08251BB4FA6
Provisioning UDID: 8D8775C9-4920-5CEB-BAB5-C08251BB4FA6

The below logic boards were listed for my model iMac I purchased in 2019, but which of these three logic boards is mine? Or where would I find out which one?

661-12479, 3.6GHz 8-core Intel Core i9, Radeon Pro 580X, FCC
661-12480, 3.6GHz 8-core Intel Core i9, Radeon Pro 580X, ETSI
661-12481, 3.6GHz 8-core Intel Core i9, Radeon Pro 580X, ROW