 LAS VEGAS, NV, March 16, 2021 GLOBE NEWSWIRE -- via NewMediaWire -- MSSV extends LOI with GSCG for an additional 90 days. Meso Numismatics, Inc. Meso Numismatics or the Company MSSV, a technology and numismatic company specializing in the Meso Region, including Central America and the Caribbean, is pleased to announce the completion of this final post closing agreement. 