\documentclass[a4paper,10pt,landscape]{article}
\usepackage[utf8]{inputenc}
\usepackage[T1]{fontenc}
\usepackage[landscape,top=0.8cm,bottom=0.8cm,left=0.8cm,right=0.8cm]{geometry}
\usepackage{array}
\usepackage{helvet}

% Set sans-serif font as default
\renewcommand{\familydefault}{\sfdefault}

\setlength{\parindent}{0pt}
\setlength{\tabcolsep}{3pt}
\pagestyle{empty}

\newcommand{\rowheight}{2.833cm}

\begin{document}

% Upper card table (rows 1-3)
\noindent
\begin{tabular}{|p{6.6cm}|p{6.6cm}|p{6.6cm}|p{6.6cm}|}
\hline
% Row 1
\parbox[c][\rowheight][t]{6.5cm}{%
{{CELL_1_1}}}
&
\parbox[c][\rowheight][t]{6.5cm}{%
{{CELL_1_2}}}
&
\parbox[c][\rowheight][t]{6.5cm}{%
{{CELL_1_3}}}
&
\parbox[c][\rowheight][t]{6.5cm}{%
{{CELL_1_4}}}
\\
\hline

% Row 2
\parbox[c][\rowheight][t]{6.5cm}{%
{{CELL_2_1}}}
&
\parbox[c][\rowheight][t]{6.5cm}{%
{{CELL_2_2}}}
&
\parbox[c][\rowheight][t]{6.5cm}{%
{{CELL_2_3}}}
&
\parbox[c][\rowheight][t]{6.5cm}{%
{{CELL_2_4}}}
\\
\hline

% Row 3
\parbox[c][\rowheight][t]{6.5cm}{%
{{CELL_3_1}}}
&
\parbox[c][\rowheight][t]{6.5cm}{%
{{CELL_3_2}}}
&
\parbox[c][\rowheight][t]{6.5cm}{%
{{CELL_3_3}}}
&
\parbox[c][\rowheight][t]{6.5cm}{%
{{CELL_3_4}}}
\\
\hline
\end{tabular}

\vspace{1.8cm}

% Lower card table (rows 1-3, identical)
\noindent
\begin{tabular}{|p{6.6cm}|p{6.6cm}|p{6.6cm}|p{6.6cm}|}
\hline
% Row 1
\parbox[c][\rowheight][t]{6.5cm}{%
{{CELL_1_1}}}
&
\parbox[c][\rowheight][t]{6.5cm}{%
{{CELL_1_2}}}
&
\parbox[c][\rowheight][t]{6.5cm}{%
{{CELL_1_3}}}
&
\parbox[c][\rowheight][t]{6.5cm}{%
{{CELL_1_4}}}
\\
\hline

% Row 2
\parbox[c][\rowheight][t]{6.5cm}{%
{{CELL_2_1}}}
&
\parbox[c][\rowheight][t]{6.5cm}{%
{{CELL_2_2}}}
&
\parbox[c][\rowheight][t]{6.5cm}{%
{{CELL_2_3}}}
&
\parbox[c][\rowheight][t]{6.5cm}{%
{{CELL_2_4}}}
\\
\hline

% Row 3
\parbox[c][\rowheight][t]{6.5cm}{%
{{CELL_3_1}}}
&
\parbox[c][\rowheight][t]{6.5cm}{%
{{CELL_3_2}}}
&
\parbox[c][\rowheight][t]{6.5cm}{%
{{CELL_3_3}}}
&
\parbox[c][\rowheight][t]{6.5cm}{%
{{CELL_3_4}}}
\\
\hline
\end{tabular}

\end{document}